That stuck-on mess from the time you tried to heat up your leftover spaghetti is going to take a lot of elbow grease to remove. Luckily, a little steam can make the job a whole lot easier. Simply fill a microwave-safe bowl with a few tablespoons of white vinegar and a cup of water, and nuke on high for a few minutes. Your microwave will quickly steam up, making those caked on messes a breeze to clean off afterwards.