Fill your dishwasher’s rinse aid reservoir with a dishwasher rinse aid or white household vinegar to reduce water-spotting-related cloudiness. White vinegar should also help remove calcium deposits. Load your cloudy dishes into the dishwasher and run the unit.
Attack cloudy glasses that remain cloudy with a more direct application of vinegar. Fill a small plastic tub with equal parts water and white vinegar. Place a piece of cloudy glassware into the tub, and let it soak for a few hours. Rinse the glass in clean water, and wipe it dry. Cut a lemon in half, and rub the exposed fruit along the surfaces of glassware that is still cloudy.
Add a few teaspoons of fine sand to the inside of the glassware. Fill the interior a quarter full with denatured alcohol. Gently swirl this mixture inside your glassware, and rinse.