How can I eliminate spotting and filming on dishes?

Use a liquid rinse aid to condition the final rinse water and keep the rinse aid dispenser filled. Always use a high-temperature option. If your water hardness is 13 grains or above, it is strongly recommended that you install a home water softener. Ensure water temperature is at least 120°F (49°C) as it enters the dishwasher, and use the correct amount of fresh detergent.