Frequently asked questions about rinse aid for residential dishwashers. This page covers whether rinse aid is required for spot-free glasses and plastic tubs.
Rinse aid is optional for most modern machines. Detergent tablets with built-in surfactants often deliver acceptable drying without a separate rinse-aid reservoir fill.
If glasses show water spots in a soft-water home, add rinse aid gradually rather than filling the dispenser to the maximum line on the first attempt.
Check the indicator window monthly. Many households refill every six to eight weeks when running one load per day.
Wipe spilled liquid from the door gasket when refilling so the seal does not stick on the next cycle.