When food splatters all over your microwave it makes it work harder. Why, believe it or not, it uses extra energy to heat up that mess! An easy way to keep your microwave clean and efficient, is to zap a microwave-safe bowl filled with water, a little lemon juice, and a drop of vinegar until you can see steam forming on the window. Wipe the inside down with a paper towel and all that stuck-on, leftover food will come off easily!