Cloudy glasses can come from mineral deposits, detergent residue or permanent damage to the glass. A white film alone does not tell you that the dishwasher needs a new pump or that your home needs a water softener.

Start with one glass

Gently rub a small cloudy area with white vinegar. If the film clears, deposits are likely. If it remains, the glass may be etched. Etching damages the surface and cannot be washed away. Whirlpool explains this distinction in its guide to cloudy glassware.

Check the wash before changing the water treatment

Make sure dishes leave room for the spray arms to turn and the detergent dispenser to open. Use dishwasher detergent and follow the appliance instructions for detergent quantity and rinse aid. More detergent is not always better, particularly with softened water.

Clean a removable filter according to the model manual. For deposits inside the machine, use the cleaning product and cycle the manufacturer recommends. The vinegar test on a glass is not a recommendation to pour vinegar into every appliance.

Find out what water reaches your dishwasher

If deposits keep returning, test the water at your home rather than assuming a hardness level from your Mount Prospect address. If you have a softener, check its settings and maintenance instructions. Keep the result with the dishwasher model number so you can compare it with the manufacturer’s recommendations.

A dishwasher that also leaves food behind, stops during a cycle or displays a fault needs a separate diagnosis. Record the exact code and what the machine was doing. Those observations are more useful for a repair visit than guessing which part has failed.