Pour 1 cup of white vinegar into the dishwasher. If you have glassware that currently has cloudy film build-up, load them into the dishwasher to be cleaned.
Set the wash cycle to normal and start the dishwasher. This dissolves the hard water buildup in the dishwasher and removes the cloudy film from the glassware.
Clean the dishwasher using 1 cup of white vinegar once every two months to prevent future buildup.