What are the benefits of salt and rinse aid in a dishwasher?

Salt is needed to help balance the water and if no salt is present, you may find a cloudy film coated on your glassware and cutlery. Check salt levels often, especially if you live in a hard water area. Always add rinse aid to your dishwasher, it helps the drying process after the cycle has finished. It does this by stopping the water forming into droplets and drying, which could lead to water marks.