How to Clean the Inside of a Microwave

Microwaves accumulate splatter and burnt-on food faster than almost any appliance in the kitchen, and they're also one of the easiest to restore. The inside is a contained space with no moving parts to worry about, no electrical risk from moisture if you're careful, and surfaces that respond instantly to the right technique. The best approach isn't aggressive scrubbing—it's steam. Hot water vapor softens dried food and grease, lifts it away from surfaces, and loosens stuck-on debris without scratching the interior coating or damaging the magnetron. You'll spend more time letting the microwave do the work than doing any scrubbing yourself. A clean microwave isn't just about appearance. Charred food buildup can actually affect how efficiently the unit heats, and lingering odors transfer to everything you cook next. Done right, the interior comes clean in one cycle, smells fresh again, and you're left with a working appliance that doesn't broadcast last month's popcorn disasters.

  1. Clear the Space First. Take out the rotating glass turntable. Set it aside on the counter—you'll clean it separately in the sink. Look at the microwave's interior walls, ceiling, and floor. If there are large chunks of dried food stuck to surfaces, scrape them away now with a plastic scraper or old credit card. Work gently so you don't gouge the interior coating.
  2. Mix Your Cleaning Agent. Pour 2 cups of water into a ceramic or glass bowl that's safe for microwaves. Cut a fresh lemon or lime in half and squeeze the juice into the water. Drop both halves into the bowl as well. The citric acid is what breaks down grease and burnt-on food; the water creates the steam that carries it.
  3. Let Heat Do the Work. Put the bowl in the center of the microwave. Close the door and set the timer for 5 minutes at full power. The water will heat, steam will fill the chamber, and the citric acid vapor will begin breaking down grease and burnt food on all interior surfaces. You'll see the windows fog up—that's exactly what you want.
  4. Don't Open Yet. When the timer goes off, do not open the door immediately. Leave it closed for another 2 minutes. The steam will continue circulating and penetrating the loosened food and grease. This resting period is when the real work happens—the acid and heat are still softening what's stuck to the walls and ceiling.
  5. Extract Safely. Open the microwave door—steam will billow out. The bowl is extremely hot, so use both hands with an oven mitt or folded kitchen towel to lift it straight out. Set it on a heat-safe surface on the counter. Be careful not to splash the hot lemon water on yourself.
  6. Wipe All Surfaces. Take a clean, damp cloth or sponge (not dripping wet, just moist) and wipe all interior surfaces—walls, ceiling, floor, and the underside of the lid. The steam will have softened everything, so the cloth will do almost all the work. Stubborn spots will wipe away with a gentle circular motion. If the cloth dries, dampen it again with warm water.
  7. Dry Completely. Once the interior is clean, take a second, dry cloth and wipe all surfaces again. This removes any remaining moisture and prevents mineral spots or streaks from drying onto the glass and walls. Pay attention to the corners where moisture pools.
  8. Clean the Turntable. While you're finishing the interior, fill your sink with hot water and a squirt of dish soap. Soak the turntable for a minute or two, then scrub it with a soft sponge or cloth. The same loosening that happened inside the microwave will have softened food on the turntable too. Rinse it well and dry it completely before returning it to the microwave.
  9. Reassemble and Test. Once the turntable is dry, place it back in the microwave, centered on the drive shaft. The turntable should rotate freely. Close the door. If you still detect any burnt or stale odors, run the microwave empty (or with a cup of water) for 30 seconds to freshen the air.
  10. Don't Forget the Exterior. Once the interior is clean, don't forget the outside. Wipe down the exterior panel, the handle, and the area around the door frame with a damp cloth. This is where grease and dust accumulate. Use a toothbrush or soft brush to clean out the rubber gasket around the door if debris has collected there.