Use vinegar in your dishwasher to give your glassware an extra sparkle and prevent filmy residue from hard water.

"Rinse aid improves dishwasher performance by helping dishes ... while others are gentler alternatives made with vinegar, ...

Depending on how often you run your dishwasher, you may need to top off the rinse aid every 3 to 4 weeks. If the rinse aid dispenser is full but you still find film on your dishes, check that the ...