Super concentrated GLISTEN acts as a 2-in-1 dishwasher cleaner and hard water spot remover eliminating odor causing food stains and residue that dishwasher detergents leave behind. Removes rust & iron stains, calcium build-up and other water impurities. Leaves dishes and glassware spot free. Improves water circulation and maximizes cleaning efficiency which extends the dishwasher's life and reduces frequency of expensive service calls.