If you aren't good about wiping up spills and splatters in your microwave right away, the food can get cooked onto the interior surfaces. A little water and heat can loosen the cooked-on debris, making it easier to wipe away. Use this method to clean your microwave weekly, or to get rid of the most stubborn of food splatters.
Run water over three to four white paper towels, then bunch them together. Add a drop of dish soap to the top of the wet clump of towels.
Place the towels in the microwave. Heat them on high power for 1 minute.
Let the heated towels sit in the microwave for five minutes. The waiting time allows the steam to break down all those crusty food particles.
Wipe down the inside of the microwave with steam-heated towels, wearing rubber gloves to protect your hands. Use a non-abrasive scrubbing pad to get rid of any stubborn residue. Wipe a dry paper towel over the interior to remove the remaining moisture.