NEWS YOU CAN USE: 15 Secrets to Cleaning Your Home in Half the Time. But here’s my microwave-cleaning advice, which differs from theirs: Spray the inside of the microwave with 409 or something similar. Run it on “high” for 15 seconds. Even the worst baked-on crud wipes right off. I learned this from a pro bono client, a maid, that I represented years ago. She offered the trick in lieu of a fee, and it’s a great one.