You know all those little bits that splatter over the walls of your microwave? If they are not cleaned and remove your microwave has to work harder. Why? Because everything heats up inside this oven, even those little splatters. To rid them and keep your microwave running at normal pace, fill a glass or microwave-safe bowl with 1/2 cup water and the juice from one lemon. Heat for 3 minutes to loosen the debris and then wipe off. You’re done. This can add 5 years to your microwave oven’s life.