Practically Functional shares this quick steam-cleaning method for it. Microwave a bowl with 1 to 2 cups water and 1 to 2 tablespoons vinegar for 5 minutes. And don't open the machine yet. Leave it for 2 minutes or so to let the steam completely loosen up the caked splatters of food. Then, carefully take out the bowl and turntable plate to wash and wipe down the inside thoroughly.