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Toaster Oven Smoking? Crumbs, Grease, and the Liner That Catches Both

Burnt crumbs and splattered grease cause most toaster oven smoke. Clean it out tonight, then a liner catches the drips so the next batch does not burn.

By Jamilur Rahman Updated November 5, 2026 · 6 min read

Time
20 min
Cost
Under $20
Difficulty
Easy
A toaster oven with its crumb tray pulled out, covered in dark burnt crumbs, and a thin wisp of smoke rising near the heating element
In this guide
  1. Quick answer
  2. Free vs. permanent fix
  3. What you'll need
  4. Why it happens
  5. Try this first (free)
  6. When free fixes aren't enough
  7. Buy the fix
  8. Why is my toaster smoking? Pop-up toasters have their own causes
  9. What to skip
  10. FAQ
  11. Related problems

Quick answer

Why is my toaster oven smoking? Almost always it is burnt crumbs on the crumb tray or old grease on the walls and elements. Unplug it, let it cool, then wash the tray and wipe the inside, which takes about 20 minutes and costs nothing. A reusable liner under greasy or cheesy food catches the drips that start the smoke, so the clean-out lasts longer.

Free fix vs. permanent fix

Free fix · 20 minutes

Cool it down and clean it out

  • Unplug it and let it cool completely
  • Empty and wash the crumb tray
  • Scrub the walls and door with baking soda paste
  • Brush crumbs off the elements with a dry brush

How long it lasts: Until the next greasy batch. With regular use, crumbs and drips build up again within a few weeks.

Most readers choose Permanent fix
Reusable toaster oven liner (illustration)
Illustration

A reusable toaster oven liner

Most smoke starts when a drip or crumb lands on a hot surface. A liner sized for your tray or rack catches that mess and rinses clean. It cannot clean an oven that is already dirty, so do the free clean-out first.

What to get: Reusable toaster oven liner

How long it lasts: As long as you rinse it after greasy food. It catches drips and crumbs so they never burn on hot metal.

Check price on Amazon

As an Amazon Associate I earn from qualifying purchases.

What you'll need

  • Dish soap and sponge

    For the crumb tray and rack

    You have it

  • Baking soda

    A gentle scrub for baked-on grease

    You have it

  • Dry pastry brush

    Sweeps crumbs off the elements without water

    You have it
  • Our pick
    Reusable toaster oven liner (illustration)
    Illustration

    Reusable toaster oven liner

    Catches drips before they reach hot metal

    Check price
  • Rimmed toaster oven pan (illustration)
    Illustration

    Rimmed toaster oven pan

    A good catch pan for wings, bacon and other fatty food

    Check price

Why it happens

1

Burnt crumbs on the tray

Crumbs fall through the rack and pile up right below the elements. Old toast, cheese and pizza crust char and smoke every time the oven heats up.

2

Grease baked onto the walls and elements

Bacon, wings and frozen snacks spit fat. It bakes onto the walls and elements and smokes at a lower temperature each time.

3

Food too close to the top element

Cheese, marshmallows and loose foil can scorch within minutes when they sit an inch or two from the heat. Anything that touches an element can smoke or catch fire.

4

Coating on a new unit

A brand-new toaster oven often smokes lightly on its first runs as factory oils burn off. It should fade after one or two empty runs with a window open.

Try this first (free)

Do these in order, starting with the simplest.

  1. Unplug it and let it cool

    Pull the plug and wait at least 30 minutes. Never clean a hot or plugged-in toaster oven.

  2. Empty and wash the crumb tray

    Tool used: Dish soap and sponge

    Slide the tray out, tip the crumbs into the trash and wash it in hot, soapy water. Rub off baked-on bits with a sponge.

  3. Scrub the walls and door with baking soda

    Tool used: Baking soda

    Mix 2 tablespoons of baking soda with a little water into a paste. Spread it on greasy spots, wait 15 minutes, then wipe with a damp sponge. Do not spray cleaner on the elements.

  4. Brush crumbs off the elements

    Tool used: Dry pastry brush

    Sweep loose crumbs off the elements and the bottom with a dry brush. Leave the elements dry. Water and abrasive pads can damage them.

  5. Run it empty for 10 minutes

    Put the clean tray back and run the empty oven at 350°F for 10 minutes with a window open. Any leftover residue burns off now instead of on your food.

  6. Catch the drips next time

    Tool used: Reusable toaster oven liner

    Put a liner or a rimmed pan under greasy food, keep food an inch or two from the top element and wipe up grease once the oven has cooled.

    Reusable toaster oven liner (illustration)
    Illustration

    Tool for this step

    Reusable toaster oven liner · Catches drips before they reach hot metal

    Check price on Amazon

When free fixes aren't enough

If it still smokes after cleaning, look for foil or food touching an element and for crust stuck where a brush cannot reach. Stop using it and unplug it if you see sparks or flames, smell hot plastic or an electrical burn, or the cord or plug feels hot. Do not pour water on a grease fire; keep the door shut and unplug it if you can do so safely. If you cook greasy foods often, a liner catches the drips so you clean the liner, not the whole oven.

Buy the fix

Still stuck after the free fixes? These are the products we would look at.

Best pick
Reusable toaster oven liner (illustration)
Illustration

Reusable toaster oven liner

Fixes: drips and crumbs burning on hot metal

Look for: A listed heat rating that covers how you usually cook; Sized to fit your tray or rack without touching the elements; A non-stick surface that wipes clean or rinses under the tap.

Who it's for
Anyone who cooks greasy or cheesy food in the toaster oven.
Honest downside
Your manual says not to line the tray or rack. Follow the manual and use a rimmed pan instead.
Check price on Amazon

As an Amazon Associate I earn from qualifying purchases. We don't show prices because they change, so use the button to see today's price.

How we picked: How we picked: this page is based on the cleaning and safety sections of toaster and toaster oven manuals, appliance fire-safety advice, and what owners report in reviews of oven liners. We do not test products by hand.

Why is my toaster smoking? Pop-up toasters have their own causes

A pop-up toaster has no crumb tray to wash, only a slide-out one on some models. Crumbs pile up in the bottom and burn on the elements, and sugar or filling from pastries adds smoke. A new toaster can also give off a light smoke on its first uses. If the smoke is heavy, comes with a burning plastic smell or sparks, unplug it and stop using it.

What to skip

Oven spray and foil on the crumb tray

Skip oven cleaner sprays inside a toaster oven. They can damage the coating and leave fumes that smoke the next time you heat it. Many manuals also warn against covering the crumb tray with foil, because it can trap heat. Check yours.

Frequently asked questions

How to stop toaster oven from smoking for good?
Wash the crumb tray and wipe the walls every couple of weeks, and wipe up grease right after cooking once the oven is cool. Use a liner or a rimmed pan for fatty food, and keep food away from the top element.
Why does my toaster smoke when I make toast?
In a pop-up toaster, crumbs fall to the bottom and burn on the elements. Sugary or filled pastries drip and char too. Unplug it, turn it upside down over the trash and shake out the crumbs.
Toaster keeps smoking even after I cleaned it. What now?
Check for a stuck crumb near the elements, residue from a pastry filling or a heating element that has gone bad. Run it empty once outdoors or by an open window. If it still smokes, replace it. A cheap toaster is not worth the risk.
How to stop toaster smoking if it is a pop-up toaster?
Never poke inside with a fork or knife. Shake out crumbs weekly, use the lowest setting that browns your bread and skip pastries with icing or filling unless the manual says they are fine.

As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure

Reusable toaster oven liner (illustration)
Illustration

Our pick: Reusable toaster oven liner

Check price