Follow up by using white vinegar as a natural disinfectant. Dip a microfiber cloth in a 50-50 water-vinegar solution, wring it out until it is slightly damp and use it to wipe down the surfaces.
In most cases, this will be enough to leave your microwave’s interior sparkling. If there are still some splatters, just repeat the process.
Wipe the rubber gaskets with a damp cloth too. A damp cloth is also a good choice for wiping down the glass door, but if the door is very greasy, use a 50-50 water-and-white-vinegar solution or glass cleaner. For a polished look, wipe everything dry with a soft, dry cloth.
Carpenter recommends steam-cleaning the microwave’s interior once every week or so, but this method works even if you go longer between cleanings. And if you’re vacuuming your refrigerator vents, do your microwave vents at the same time. Your microwave will appreciate it.