Rinse agents improve the drying process especially in the new dishwashers with plastic (polypropylene) tubs. Rinse agents will also reduce spotting and filming. We also recommend this in hard water areas to help prevent spotting and filming.
Not all items are safe to wash in the dishwasher. Check the manufacturer’s instructions first to be sure the items are recommended dishwasher safe. Aluminum items can darken due to minerals in the water and alkalinity of the detergent. Cast iron utensils will lose their “seasoned” finish and rusting can result. Pewter or pewter-like materials may streak, discolor, or pit.