1. When reheating a dish or plate of food in the microwave turn a paper plate over and use as a "lid" this will keep your micowave cleaner much longer.
2. If the microwave has become a splattering mess that is stuck on, you can take a small microwave safe bowl and fill 1/2 with water and heat to the point of making steam, let set for a couple minutes them just use a paper towel and wipe out.