Dishwasher Not Cleaning Well? Solve the Problem

A dishwasher that does not clean properly defeats its purpose. Before assuming the machine needs repair, check these common causes of poor cleaning performance.

Water temperature matters significantly. The incoming water should be at least 120 degrees Fahrenheit. Run the hot water at the kitchen sink until it is hot before starting the dishwasher.

Check the spray arms for clogs. Food particles and mineral deposits can block the small holes. Remove the arms and clear each hole with a toothpick or wire. Rinse thoroughly.

Examine the filter. Many homeowners do not realize dishwashers have filters that require regular cleaning. A clogged filter restricts water circulation and redeposits food on dishes.

Loading affects results dramatically. Dishes should face the center spray arms. Do not nest items together—water needs to reach all surfaces. Large items should not block the spray arms.

Detergent issues are common. Using too much creates residue; too little means inadequate cleaning. Use only detergent designed for automatic dishwashers, and check for clumping in stored detergent.

The rinse aid dispenser helps water sheet off dishes. Without rinse aid, water spots are common, and dishes may not dry properly. Fill the dispenser regularly.

Hard water causes film and spots even with proper washing. If your water is hard, consider a rinse agent designed for hard water, or have a plumber install a water softener.

If problems persist after checking all these factors, the circulation pump, water inlet valve, or control board may need professional diagnosis.