After a period of time, the inside of your dishwasher can look stained or dull. To give it a brightening fill the detergent cups with LEMON flavored Kool-Aid (this is the only flavor that works!). You can also try, Tang, 1/2 cup of white vinegar, or a few tablespoons of powdered laundry bleach. Run the EMPTY dishwasher through a complete cycle. You should see visible results!