what is rinse aid

Rinse aid is a surfactant that lowers the surface tension of water, allowing it to more easily slide off dishes in the dishwasher. It helps prevent water spots from forming on dishes, especially in hard water areas, and also helps dishes dry faster. Rinse aid is typically poured into a special compartment in the dishwasher and is automatically dispensed during the final rinse cycle. It is especially useful for combating water spots and filmy residue on dishes. Using rinse aid is recommended, particularly if you have hard water or if you notice water spots on your dishes after they are washed