Dishwasher Leaving Film on Dishes

Quick answer

Film on dishes is often caused by hard water or insufficient detergent. Check your water hardness, use a water softener or rinse aid, and ensure proper detergent usage. Regular maintenance can also help prevent film buildup.

Confirm the symptom

• Dishes have a cloudy or hazy film after washing
• Film appears even after a complete wash cycle
• Dishes feel sticky or greasy after drying

Tools and prep

• Plastic scrub brush
• White vinegar
• Water softener test kit
• Rinse aid dispenser
• Gloves
• Turn off the dishwasher power at the circuit breaker
• Shut off water supply to the dishwasher

Step-by-step troubleshooting

1. Check Water Hardness
   Do: Test your home’s water hardness using a test kit.
   Observe: High mineral content in water.
   Means: Hard water is likely causing the film.
   Next: Use a water softener or add vinegar to the rinse cycle.
2. Inspect Detergent Usage
   Do: Check the type and amount of detergent being used.
   Observe: Using too little detergent or the wrong type.
   Means: Insufficient cleaning power leads to film.
   Next: Switch to a high-efficiency (HE) detergent and use the recommended amount.
3. Check Rinse Aid Level
   Do: Look at the rinse aid dispenser in the dishwasher.
   Observe: Low or empty rinse aid.
   Means: Lack of rinse aid prevents proper drying.
   Next: Refill the rinse aid dispenser with a quality product.
4. Clean the Dishwasher
   Do: Run a cleaning cycle with white vinegar or a dishwasher cleaner.
   Observe: Foaming and residue inside the dishwasher.
   Means: Mineral buildup or debris is present.
   Next: Scrub the interior with a plastic brush and wipe clean.
5. Adjust Water Temperature
   Do: Ensure the water entering the dishwasher is at least 120°F (49°C).
   Observe: Water temperature below 120°F.
   Means: Cold water reduces detergent effectiveness.
   Next: Adjust the water heater temperature or check the dishwasher’s heating element.
6. Inspect Spray Arms
   Do: Check the spray arms for clogs or damage.
   Observe: Blocked spray nozzles or uneven water distribution.
   Means: Poor water flow leads to incomplete cleaning.
   Next: Clean the spray arms with a brush or replace if damaged.
7. Check Dishwasher Vent
   Do: Inspect the dishwasher vent for blockages.
   Observe: Blocked vent preventing proper air circulation.
   Means: Moisture cannot escape, leading to film.
   Next: Clean the vent and ensure it is unobstructed.

Common causes

Parts matching

Common parts that may be needed to fix film on dishes include:

• Water softener or rinse aid
• High-efficiency dishwasher detergent
• Spray arm cleaning kit or replacement spray arms
• Dishwasher cleaner or white vinegar
• Water heater adjustment tools

Always use products recommended by your dishwasher manufacturer to avoid damage.

When to call a professional

• Film persists after trying all troubleshooting steps
• Dishwasher makes unusual noises or fails to drain
• Water temperature remains too low despite adjustments
• You suspect a faulty drain pump or internal electrical issues
• You are unsure about electrical or plumbing repairs

FAQ

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