Dishwasher Not Cleaning Dishes? How to Fix Poor Wash Performance
Why Is My Dishwasher Not Cleaning Properly?
Cloudy glasses, food stuck on plates, and gritty silverware are signs that your dishwasher isn't cleaning properly. Before you spend money on a new one, try these common fixes.
Simple Fixes to Try First
1. Clean the Spray Arms
The spray arms have small holes that can become clogged with mineral deposits, food particles, and debris. Remove the spray arms and clean each hole with a toothpick or small wire. Soak them in vinegar for 30 minutes to dissolve mineral buildup.
2. Check the Water Temperature
Your dishwasher needs hot water — at least 120°F (49°C) — to clean effectively. Run the hot water at the kitchen sink before starting the dishwasher to ensure hot water reaches it from the start.
3. Clean the Filter
Modern dishwashers have a manual filter at the bottom of the tub that needs to be cleaned regularly. A clogged filter means dirty water is being recirculated onto your dishes. Clean it weekly or bi-weekly.
Parts That May Need Replacing
4. Faulty Water Inlet Valve
The water inlet valve controls the flow of water into the dishwasher. If it's failing, the dishwasher may not get enough water to clean properly. You'll notice low water levels in the tub during a cycle.
5. Worn Wash Impeller or Wash Motor
The wash motor and impeller create the water pressure that cleans your dishes. If the impeller is worn or the motor is weak, water pressure drops and cleaning performance suffers.
6. Broken Soap Dispenser
If the detergent dispenser doesn't open during the wash cycle, your dishes are essentially being washed with just water. Check that the dispenser latch and spring mechanism work properly.
Maintenance Tips for Better Cleaning
- Run a cleaning cycle monthly with dishwasher cleaner or a cup of white vinegar
- Don't overload — dishes need space for water to circulate
- Use fresh detergent — old detergent loses effectiveness
- Clean the door gasket regularly to prevent odors and mold
