Dishwasher Not Cleaning Dishes? Try These 7 Fixes

Nothing's more frustrating than unloading your dishwasher only to find dishes still covered in food residue. Before you give up and start hand-washing everything, try these seven fixes that solve most dishwasher cleaning problems.

1. Clean the Filter

The Problem: Most modern dishwashers have a manual-clean filter at the bottom of the tub. When it's clogged with food debris, water can't circulate properly and dishes don't get clean.

What to Do: Locate the filter (usually at the bottom center), twist to remove it, and clean it under running water. Clean the filter monthly for best results.

2. Check the Spray Arms

The Problem: The spray arms have small holes that can get clogged with mineral deposits or food particles, reducing water pressure and coverage.

What to Do: Remove the spray arms and use a toothpick to clear any clogged holes. Soak them in vinegar if there's mineral buildup, then rinse thoroughly.

3. Use Hot Water

The Problem: Dishwasher detergent needs hot water (at least 120°F) to dissolve properly and clean effectively. If your water heater is set too low or you start the dishwasher when water is cold, dishes won't get clean.

What to Do: Run hot water at the kitchen sink until it's hot before starting the dishwasher. This ensures the first fill is hot. Check that your water heater is set to at least 120°F.

4. Don't Overload or Improperly Load

The Problem: Overloading blocks water spray, and improper loading creates "shadow" areas where water can't reach.

What to Do:

• Face dirty surfaces toward the spray arms (usually down and center)
• Don't nest items—they block water flow
• Place large items on sides/back so they don't block spray arms
• Ensure nothing is blocking the detergent dispenser door

5. Check Your Detergent

The Problem: Old detergent loses effectiveness. Using the wrong type or too much/too little can also cause problems.

What to Do: Use fresh detergent (pods often work better than powder in hard water). Don't overfill the detergent cup—follow the manufacturer's guidelines. If you have hard water, consider using a rinse aid.

6. Run a Cleaning Cycle

The Problem: Over time, grease, soap scum, and food particles build up inside the dishwasher, affecting cleaning performance and causing odors.

What to Do: Run an empty cycle with a dishwasher cleaner or place a cup of white vinegar on the top rack and run a hot cycle. Do this monthly for maintenance.

7. Check Water Inlet Valve

The Problem: If the water inlet valve is failing, not enough water enters the dishwasher for proper cleaning.

What to Do: Listen during the fill cycle. If you hear a humming but little water is entering, the valve may be clogged or failing. This requires professional repair.