I really like the idea of a clean microwave but at my house, no one--myself included--remembers to cover plates before they get cooked. Ergo, there is a random mix of crusty pasta sauce, splattered Cream of Wheat, and something else I haven't quite identified.
Shocking. I know.
When I need to clean the microwave, I let microwave work for me--sort of like a self-cleaning oven.
Here's what to do:
Get a microwave safe bowl and fill it with equal parts of distilled white vinegar and water.
Put it in the microwave and get it cookin' to a rolling boil.
Wipe it out with a clean cloth.
You'll be amazed at the way crusty stuff gets loosened and odors disappear.