How to Remove Smell From a Toaster

You pull a slice of perfectly golden toast out of your toaster, ready to slather it with butter, and the first thing that hits you is a smell like burnt plastic, rancid grease, or mildew instead of fresh, toasty bread. It’s a common, frustrating problem, most people don’t realize how much gunk builds up inside their toaster over time, and that lingering smell isn’t just unpleasant. It can transfer to every piece of food you toast, and in worst cases, signal a serious safety hazard like faulty wiring.

The good news? 9 times out of 10, you don’t need to buy a new toaster to fix the smell. A 15-minute deep clean with household supplies you already have will make your toaster smell like new again, no special tools required.

I’ve tested every toaster cleaning trick out there over the past decade, working as a small appliance repair technician and home goods tester. The method below works for every type of toaster, from cheap 2-slice dorm models to high-end smart toasters with bagel and defrost settings. We’ll cover every possible cause of toaster smells, step-by-step cleaning instructions, natural deodorizing solutions, red flags that mean you need to toss your toaster instead of cleaning it, and simple tips to stop smells from coming back.

Let’s fix that stinky toaster once and for all.

Image source: Pexels / Ketut Subiyanto (Pexels License)

Why Does Your Toaster Smell, Anyway?

Toaster smells fall into five broad categories, each with a different fix, and some require more than just cleaning. Let’s break down every common cause, plus regional factors that make some smells more likely depending on where you live.

Crumb buildup is the most common cause of toaster smells. Every time you toast bread, small crumbs fall into the slots and land on the heating elements or interior walls. When these crumbs touch the hot heating elements, they burn instantly, producing carbonized, charred particles that stick to the toaster’s interior.

Over weeks or months, this buildup gets thicker, and every subsequent use burns more crumbs on top of the old residue, creating a stronger, more persistent burnt smell. In regions where thick-sliced artisanal bread, crumpets, or sourdough are popular (like the UK, Australia, and coastal U.S. states), crumb buildup happens even faster, as these breads produce more loose crumbs than standard pre-sliced white bread.

Burnt food residue causes greasy, rancid smells. If you toast bagels with cream cheese, grilled cheese sandwiches, frozen waffles, or pizza rolls, melted butter, oil, dairy, and sugar can splatter onto the heating elements and interior walls. When this residue cools, it hardens, and over time, it goes rancid, producing a sour, greasy odor that transfers to every piece of food you toast later.

In hot, humid climates, this residue is even more likely to grow mold, adding a musty note to the smell.

Manufacturing residues are common in new toasters. Most new units have a thin protective coating on the interior to prevent rust during shipping, plus factory dust and debris left over from assembly. The first 2-3 times you use a new toaster, this coating and dust burn off the heating elements, producing a sweet, chemical smell that’s usually harmless.

This smell fades on its own, but if it persists after three uses, or smells acrid like burnt plastic, it’s a sign of a manufacturing defect.

Spilled liquids and humidity lead to mold and mildew smells. If you accidentally spill water, melted butter, or other liquids into the toaster slots, moisture can seep into the crumb tray and interior crevices. In humid regions like the Southeast U.S., tropical Southeast Asia, and coastal Europe, excess air moisture also seeps into toasters left unplugged and damp after cleaning.

This moisture creates the perfect environment for mold and mildew to grow, producing a musty, earthy smell that can trigger respiratory issues for people with allergies or asthma, per U.S. Environmental Protection Agency mold guidance.

Electrical issues cause acrid, dangerous smells. If you notice a sharp, burnt plastic smell that doesn’t fade after cleaning, it can signal frayed wiring, a faulty thermostat, or melted internal plastic components. This is a serious fire and shock risk, per [U.S.

Consumer Product Safety Commission small appliance safety guidelines. Never use a toaster with this type of smell, even if it still turns on.

Safety First: Pre-Cleaning Prep You Can’t Skip

Skipping these prep steps can lead to electric shock, damage to your toaster, or even a fire. Follow these rules every time you clean your toaster, no matter how mild the smell is.

1. Unplug the toaster completely. Never rely on the toaster’s on/off switch alone, pull the plug directly from the wall outlet. Even if the toaster is turned off, electricity still flows to the heating elements and internal components, creating a serious shock risk if you touch them with wet hands or metal utensils.
2. Let it cool completely. If you used the toaster in the last hour, wait at least 30 minutes before cleaning. Heating elements stay hot for far longer than the outside of the toaster, and touching them can cause serious burns.
3. Work in a well-ventilated area. If the smell is strong, take the toaster outside or place it next to an open window. Breathing in burnt crumb particles or mold spores can irritate your lungs, especially if you have asthma or allergies.
4. Gather the right supplies. You’ll need soft microfiber cloths, a soft-bristled brush (an old toothbrush works perfectly), a non-abrasive sponge, mild dish soap, white vinegar, baking soda, a small bowl, and a vacuum with a brush attachment (optional, for loose crumbs). Avoid harsh chemical oven cleaners, bleach, scented sprays, steel wool, and metal utensils, these can damage the toaster’s heating elements, non-stick coatings, and plastic components, and leave toxic residues that transfer to your food.

If you have a smart toaster with a digital touchscreen or control panel, avoid getting any liquid on the front of the unit. Use a dry cloth to wipe the control panel separately, as moisture can damage the electronics.

Use this quick guide to pick the right supplies for your toaster’s smell type:

5. Remove loose crumbs first. Before wet cleaning, turn the toaster upside down over a trash can and shake it gently to dislodge loose crumbs. Use a dry soft brush to sweep crumbs out of the slots and corners of the interior. If you have a vacuum with a brush attachment, you can use it to suck up loose crumbs, but don’t shove the vacuum nozzle into the slots, as that can damage the heating elements.

Step 1: Clean the Crumb Tray and Interior

The crumb tray is the #1 source of toaster smells, 90% of lingering burnt odors come from crumbs stuck in this tray that burn every time you use the toaster. Most toasters have a removable crumb tray that slides out from the bottom or front of the unit.

Image source: Pexels / Timur Saglambilek (Pexels License)

First, slide out the crumb tray and dump all loose crumbs into the trash. Wash the tray with warm, soapy water, using a soft sponge to scrub away any stuck-on greasy residue. Don’t use abrasive scrubbers or steel wool, these can scratch the tray’s surface, making it hold onto more gunk over time, and scratch off non-stick coatings if your tray has one.

Rinse the tray thoroughly, then dry it completely with a clean towel before sliding it back into the toaster.

If your toaster doesn’t have a removable crumb tray, don’t worry, you can still clean it effectively. Turn the toaster upside down over a trash can and shake it gently to dislodge loose crumbs. Use a soft-bristled brush (an old toothbrush works perfectly) to sweep crumbs out of the slots and corners of the interior.

For crumbs stuck to the heating elements, use a dry, soft brush to gently sweep them away. Never use a wet cloth on the heating elements while they’re exposed, as this can cause electric shock or short circuits.

Next, clean the interior walls of the toaster. Dampen a microfiber cloth with warm, soapy water, then wring it out until it’s just barely damp, you never want dripping water to seep into the toaster’s electrical components. Wipe down all interior walls, the top and bottom of the slot openings, and any areas where food residue has built up.

For stuck-on greasy spots, leave the soapy cloth on the spot for 1-2 minutes to loosen the gunk, then wipe away. Follow up with a clean, damp cloth to remove any soap residue, then dry the entire interior thoroughly with a dry microfiber cloth.

If you have a toaster with extra-wide bagel slots, make sure to wipe down the sides of the slots too, this is where melted butter and jam often accumulate, causing lingering smells.

Step 2: Deodorize with Natural Cleaning Solutions

Once you’ve removed all loose crumbs and surface residue, it’s time to neutralize lingering odors. Avoid synthetic air fresheners or scented cleaning sprays, these just cover up smells temporarily, and leave toxic residues that can transfer to your food. Instead, use one of these natural, food-safe deodorizing methods, depending on the type of smell you’re dealing with.

Baking Soda Paste (Best for Burnt and Greasy Smells)

Baking soda is a natural odor neutralizer that absorbs grease and leftover food particles, rather than just covering up smells. It’s the most effective method for most toaster odors.

Mix 2 tablespoons of baking soda with 1 tablespoon of water to make a thick paste. Dip a soft cloth into the paste, then wring out excess liquid so the cloth isn’t dripping. Spread a thin layer of the paste over all interior walls of the toaster, especially any areas that had stuck-on food residue.

Let it sit for 30 minutes to 1 hour, baking soda will absorb any lingering grease and odors during this time.

Wipe away the paste with a clean, damp cloth, then follow up with a dry cloth to remove all moisture. Don’t leave any baking soda residue in the toaster, as it will burn the next time you use the appliance and create new smells.

Image source: Pexels / Photography Maghradze PH (Pexels License)

White Vinegar Solution (Best for Musty, Mildew Smells)

If your toaster smells musty, or you live in a humid climate where mold is common, white vinegar is the best fix. Its acidic properties break down mold and mildew, and cut through grease that causes rancid smells.

Mix equal parts white vinegar and water in a small bowl. Dampen a microfiber cloth with the solution, then wring it out until it’s just barely damp. Wipe down all interior surfaces of the toaster.

Let it air out for 10-15 minutes, then wipe down with a clean, damp cloth to remove any leftover vinegar smell, then dry thoroughly with a dry cloth.

If you don’t like the strong smell of vinegar, add 2-3 drops of food-safe essential oil (like lemon or lavender) to the solution. Just make sure to wipe away all excess liquid so the oil doesn’t burn on the heating elements.

Lemon Solution (Best for Strong Food Smells Like Garlic or Fish)

For stubborn smells from strong-flavored foods like garlic, fish, or onions, lemon’s citric acid cuts through grease and leaves a fresh, neutral scent.

Cut a lemon in half, squeeze the juice into a small bowl, and mix in 1 teaspoon of baking soda if you have it. Dip a cloth in the mixture, wring out excess liquid, and wipe down the interior of the toaster. Let it sit for 10 minutes, then wipe clean with a damp cloth, then dry thoroughly.

What to Avoid When Deodorizing

Never use chemical oven cleaners, bleach, or scented cleaning sprays inside your toaster. These products leave toxic residues that can transfer to your food when you toast, and some can damage the heating elements or plastic components. Never pour liquid directly into the toaster slots, this can seep into the electrical components and cause a short circuit or electric shock.

Step 3: Safely Clean Heating Elements

Heating elements are the thin, metal (or quartz) coils at the bottom of the toaster slots that glow red when the toaster is on. They’re the most common place for burnt crumbs and food residue to stick, and they’re also the most delicate part of the toaster, so you need to clean them carefully to avoid damage.

First, make sure the toaster is unplugged and completely cool. For loose crumbs on the heating elements, use a dry, soft-bristled brush (an old toothbrush works perfectly) to gently sweep them away. Never use a metal utensil to scrape crumbs off the elements, this can scratch or dent the thin metal, which reduces their efficiency and creates a fire hazard.

For stuck-on, burnt residue on the heating elements, mix a small amount of baking soda and water into a thick paste. Dip a cotton swab or soft-bristled brush into the paste, and gently rub the residue off the elements. Don’t scrub hard, heating elements are very thin, and aggressive scrubbing can cause them to crack or break.

Let the paste sit on stubborn spots for 5-10 minutes to loosen the gunk, then wipe away with a dry cloth.

If you have a toaster with quartz heating elements (common in higher-end models), be extra gentle, quartz is more fragile than metal, and scrubbing can cause it to shatter. Only use a dry, soft brush to sweep away loose crumbs, and don’t use any liquid or paste on quartz elements.

After cleaning the heating elements, make sure they’re completely dry before plugging the toaster back in. Any leftover moisture can cause a short circuit when the toaster is turned on.

If the heating elements are covered in so much buildup that you can’t remove it with gentle cleaning, it’s a sign your toaster is overdue for a replacement. Built-up gunk on heating elements makes them less efficient, uses more electricity, and is a major fire hazard.

Step 4: Use Steam for Stubborn, Lingering Odors

If you’ve cleaned the crumb tray, interior, and heating elements, and the smell still lingers (especially from strong foods like burnt garlic, fish, or popcorn), steam can help loosen any remaining stuck-on residue in hard-to-reach crevices.

This method is safe as long as you follow these rules:

1. Make sure the toaster is unplugged and completely cool.
2. Fill a small, heat-safe bowl with 1 cup of water. Add 2 tablespoons of white vinegar or the juice of half a lemon for extra deodorizing power.
3. If the bowl fits inside your toaster’s slots, place it inside. If not, hold the bowl a few inches above the slots.
4. Plug the toaster in and turn it on for 30 seconds to 1 minute, just until the water starts to steam. Don’t let the water boil over, and don’t leave the toaster on for longer than 1 minute, as this can damage the heating elements.
5. Unplug the toaster immediately, and let it cool completely.
6. Wipe down the interior with a dry cloth to remove any moisture.

The steam will loosen any remaining stuck-on residue in the slots and interior walls, and neutralize any lingering odors. If you don’t want to use water, you can use a handheld steam cleaner on a low setting, held 3-4 inches away from the slots, to achieve the same effect.

Red Flags: When to Toss Your Toaster Instead of Cleaning It

Not all toaster smells can be fixed with cleaning. Some smells signal serious safety or health hazards that mean you need to replace your toaster immediately. Look out for these red flags:

1. Persistent acrid plastic or burnt wiring smell that doesn’t go away after deep cleaning. This is the most dangerous sign, it means there’s faulty wiring, a broken thermostat, or melted internal plastic inside the toaster. Using this toaster can cause a fire or serious electric shock. Unplug it immediately and recycle it (most local recycling centers accept small appliances).
2. Visible rust on the heating elements or interior walls. Rust can flake off into your food, causing contamination, and it’s a sign the toaster’s internal components are corroding. Rust also reduces the efficiency of the heating elements, making the toaster use more electricity and take longer to toast bread.
3. Heating elements that don’t glow evenly, or don’t glow at all when the toaster is on. This is usually a sign of excessive buildup on the elements, or worn-out components that can’t heat properly. Uneven heating also means some areas of the elements get hotter than others, which is a major fire hazard.
4. Mold growth that won’t come off with cleaning. If you wipe down the interior and still see black, green, or white fuzzy mold spots, the mold is growing in inaccessible internal components, like the wiring compartment or the base of the toaster. Mold spores can spread to your food every time you use the toaster, causing respiratory issues, allergic reactions, and food poisoning.

Most toasters last 5-7 years with regular cleaning, so if yours is older than that and has persistent smells or performance issues, it’s usually more cost-effective to replace it than to keep repairing it.

Simple Tips to Prevent Future Toaster Smells

Cleaning your toaster regularly is the best way to stop smells from coming back, but these simple habits make cleaning even easier and prevent buildup in the first place:

1. Empty the crumb tray after every use, or at least once a week. This is the single most effective way to prevent burnt crumb smells. If you use your toaster for thick breads or crumpets that produce extra crumbs, empty the tray after every use.
2. Wipe down the interior with a dry cloth once a week. This removes loose grease and food residue before it has a chance to build up and burn. You don’t need to do a full deep clean every week, just a quick wipe with a dry cloth is enough to prevent buildup.
3. Clean up spills immediately. If you spill melted butter, jam, or liquid into the toaster slots, unplug it right away, wipe up the spill with a dry cloth, and let the interior air dry completely before using it again. Don’t leave spills to sit, as they can harden and cause buildup, or seep into electrical components and cause mold or rust.
4. Avoid toasting overly greasy foods directly in the toaster. If you’re toasting a buttered bagel, a grilled cheese sandwich, or a frozen pizza roll, place it on a piece of parchment paper or a toaster bag to catch any melted grease or crumbs. This stops residue from building up on the heating elements and interior walls.
5. Don’t use your toaster for non-food items. Never use your toaster to warm up plastic wrappers, paper towels, clothing, or other non-food items. These melt easily, producing toxic smells and residues that are almost impossible to clean off, and they’re a major fire hazard.
6. Air dry your toaster after cleaning. If you live in a humid climate, leave the crumb tray removed and the toaster unplugged for 1-2 hours after cleaning to let any leftover moisture evaporate. This prevents mold and mildew growth that causes musty smells.
7. Do a full deep clean every 1-2 months. Even if you don’t notice a smell, do a full deep clean with baking soda or vinegar every 1-2 months to remove any hidden buildup before it starts to cause odors.

Frequently Asked Questions About Removing Smell from a Toaster

We’ve answered the most common questions we get about toaster smells and cleaning, so you can fix the problem fast.

Why does my toaster smell like burning plastic even after I clean it?

A: A persistent burnt plastic smell almost always signals an electrical issue, not just surface buildup. If you’ve deep cleaned the crumb tray, interior, and heating elements and the smell persists, it’s likely frayed wiring, a faulty thermostat, or melted internal plastic. Unplug the toaster immediately and stop using it, this is a fire and shock hazard, and you need to replace the unit.

Can I use soap and water to clean the inside of my toaster?

A: Yes, but only with a damp, not dripping, cloth. Never submerge the toaster in water, and never pour water directly into the heating element slots, as this can seep into the electrical components and cause a short circuit or electric shock. Always dry the interior thoroughly with a clean cloth before plugging the toaster back in.

Will baking soda damage my toaster?

A: No, as long as you wipe away all residue after letting it sit. Baking soda is a mild abrasive, so don’t scrub the heating elements or non-stick coatings with it, just spread a thin layer on the interior walls, let it sit to absorb odors, then wipe away completely.

How often should I clean my toaster to prevent smells?

A: Empty the crumb tray after every use, wipe down the interior with a dry cloth once a week, and do a full deep clean with baking soda or vinegar every 1-2 months. If you use your toaster for greasy or frozen foods often, clean it more frequently to prevent buildup.

Is a burnt smell from a new toaster normal?

A: Yes, new toasters have factory protective coatings and manufacturing dust that burn off the first 2-3 uses. This smell is usually sweet and chemical, not acrid like burnt plastic, and it fades on its own. If the smell persists after three uses, or smells like burning plastic, contact the manufacturer, it may be a defective unit.

Can I put my toaster in the dishwasher?

A: Only the removable crumb tray, never put the main toaster unit in the dishwasher, as water can damage the electrical components. Check your toaster’s manual first, as some crumb trays have non-stick coatings that can be damaged by high-heat dishwasher cycles.

What if my toaster smells like mildew?

A: A musty mildew smell is almost always caused by mold growth from humidity or spilled liquid. Do a deep clean with a vinegar and water solution, then let the toaster air dry completely in a well-ventilated area for 24 hours. If you live in a humid climate, make sure to empty the crumb tray and leave it out to dry after each use to prevent mold from coming back.

Can I run empty cycles to burn off smells?

A: Yes, after deep cleaning your toaster, you can run 2-3 empty cycles (no bread) on the highest setting to burn off any remaining residue or cleaning solution smells. Just make sure the toaster is completely dry before you do this, and open a window to ventilate the area if the smell is strong.