how to clean a microwave

The easiest way to clean a microwave is to steam the interior with a bowl of water mixed with vinegar or lemon, then wipe away the loosened grime.

Steam the interior. Fill a microwave-safe bowl with water and add vinegar or lemon. Heat on high for 3–5 minutes, then let it sit for 5–10 minutes to allow steam to soften stuck-on food.
Wipe and wash components. Remove the turntable and roller ring to wash them in warm, soapy water or the dishwasher. Wipe the interior walls, ceiling, and door seal with a soft cloth or sponge.
Remove stubborn stains. For stubborn or burnt-on residue, apply a paste made of baking soda and water. Let it sit for several minutes before gently scrubbing with a non-abrasive cloth.
Clean the exterior safely. Wipe the exterior with a soft cloth dampened with mild soap and water. Avoid spraying liquid directly into vents or the control panel to prevent electrical damage.