Is your microwave full of old food splashes and bad smell? Don't scrub it for 30 minutes. You can clean it in 5 minutes with lemon and vinegar.
1 cup water, half cup vinegar, 1 lemon cut in half, a bowl, and a cloth.
Put water, vinegar and lemon in a bowl. Put it in the microwave and heat for 3 minutes. The steam will loosen all the dirt.
Leave the door closed for 2 minutes. Then take the bowl out carefully, it is hot. Wipe inside with a cloth. All dirt will come off easily.
Wipe the door and plate. Your microwave will smell like lemon and look new. Do this once a week.