Dampen a sponge with water. Sprinkle borax liberally onto the sponge.
Scrub the inside door and bottom floor of the dishwasher with the sponge. Wipe along the edges of the door to remove grime. Rinse the areas you cleaned with a damp rag to remove the loosened residue.
Dust ¼ cup of borax powder onto the bottom floor of the dishwasher next time you are running a load of dishes. Add the regular amount of dishwashing detergent and run the machine through a complete cycle. The borax will not only clean and freshen your dishwasher, it will help to remove spots from glassware.