Glisten™ Dishwasher Cleaner is ideal for removing built-up soap scum, food stains, and discoloration due to iron and other water impurities. Simply pour the contents into the main wash detergent well and run dishwasher through a light or normal wash cycle to make your dishwasher sparkling clean. Heavily stained dishwashers may require a second application. Monthly use is recommended. Glisten™ also removes brownish iron and hard water stains from dishes, glassware, and plastics.