What can I do to prevent spotting and filming on dishes?

Use a liquid rinse aid to condition the final rinse water and help eliminate spotting and filming, keeping the dispenser filled. Ensure water temperature is 120°F (49°C) as it enters the dishwasher, and use the correct amount of fresh detergent. If spots and film persist, try a white vinegar rinse by placing 2 cups of vinegar in a glass on the bottom rack and running a complete wash cycle without detergent. (Page 20)