How to Clean a Toaster Oven

A toaster oven collects the same hardened crumbs and baked-on grease a full-size oven does, just in a smaller space where the buildup is easier to see and smell. A toaster oven that smokes or smells burnt on preheat almost always traces back to crumbs on the tray or grease on the heating elements, not a fault with the appliance itself.

This applies to both basic toasters and larger convection models like the Breville Smart Oven Pro or Cuisinart TOB-260N1 Chef's Convection Toaster Oven — the crumb tray and interior clean the same way on both; the main difference is how many racks and accessories a convection model adds.

What actually needs cleaning (it's not just the crumb tray)

The removable crumb tray catches the obvious mess, but crumbs and grease also collect on the interior walls, on the heating elements themselves, and inside the door glass, where a greasy film builds up gradually and is easy to overlook since it doesn't fall out the way loose crumbs do.

On convection models, the fan opening at the back of the interior can collect dust and grease over time too — worth a quick check, since a dirty fan opening can affect how evenly the oven circulates heat.

How often to clean it

Empty the crumb tray every few uses, or sooner after anything that drips or splatters, like melted cheese on toast or a reheated slice of pizza — crumbs that sit and bake on repeatedly are the main reason a toaster oven starts smoking on preheat.

Wipe the interior walls and door glass every 1-2 weeks with regular use, and sooner after cooking something greasy, since fresh grease wipes off far more easily than grease that's been baked on through several more cooking cycles.

Step-by-step: crumb tray and interior

1. Unplug the oven and let it cool completely. 2. Slide out the crumb tray and, if your manual rates it dishwasher-safe, run it through a cycle, or hand-wash with warm soapy water. 3. Wipe the interior walls and any racks with a damp cloth and a little dish soap, focusing on visible grease spots. 4. For baked-on residue, let a cloth dampened with warm water and a little baking soda sit on the spot for a few minutes before wiping. 5. Dry the interior fully with a clean cloth before sliding the tray back in and plugging the oven back in.

Cleaning the heating elements and door glass

Never spray cleaner directly onto the heating elements or scrub them with an abrasive pad — wipe them gently with a barely damp cloth once they're fully cool, and let them air-dry completely before the next use.

The door glass usually isn't removable on most countertop models, so clean the inside face by opening the door fully and wiping with a damp cloth or a vinegar-water mix. On models where the inner glass panel does pop out or swing open for cleaning (check your manual), take it out for a more thorough wipe-down rather than reaching through the gap.

Stopping the smoke smell

A toaster oven that smokes when it heats up is almost always burning off crumbs or grease left over from a previous use, not a sign of a failing element — the fix is the same crumb tray and interior clean above, not a different cleaning product.

If the smell persists after a full clean, run the empty oven on its highest setting for 5-10 minutes with the kitchen vented (window open or exhaust fan on) to burn off any remaining residue, then let it cool and wipe out the ash left behind.