Dishwasher Leaving Spots on Dishes? Here's Why

Cloudy glasses and white spots on dishes are one of the most common dishwasher complaints, and the fix is often simpler than a repair.

Hard Water Minerals

In areas with hard water, mineral deposits settle on dishes as the water dries. A rinse aid helps water sheet off the dishes instead of leaving spots behind.

A Clogged Filter

Most dishwashers have a removable filter at the bottom of the tub. A filter clogged with food debris reduces water flow and leaves residue on dishes.

A Worn Spray Arm

If the spray arm's holes are clogged or the arm doesn't spin freely, water won't reach every dish evenly, leaving some spotty and some clean.

Not Using Enough Rinse Aid

Rinse aid specifically targets water spots. If your dishwasher has a rinse aid dispenser that's running low, spots are one of the first signs.

Overloading the Dishwasher

Dishes stacked too close together block water and detergent from reaching every surface, which can look like a spotting problem.

When to Call a Technician

If cleaning the filter, checking the spray arm, and adding rinse aid don't help, the water heating element or wash pump may need a closer look.

If you're not sure what's causing the problem, or the fix involves gas, electrical wiring, or refrigerant, it's best to call a licensed technician rather than take it apart yourself.