What Are the Causes of Soapy Film on Glasses After Running a Dishwasher?

Phosphate-Free Dishwasher Detergent

• Revised detergent formulas may be causing soapy film on glasses washed in the dishwasher. According to NBC News, in September 2010, many of the major dishwasher detergent manufacturers removed phosphates from their formulas. Phosphates have been identified as environmentally harmful to wildlife in rivers. However, in consumer dishwashers, phosphates prevented the buildup of hard water and reduced soapy film on glasses and dishes.

Additional Detergent Issues

• In addition to the absence of phosphates, other detergent-related factors may contribute to soapy film on dishwasher-cleaned glasses. Whirlpool recommends adding at least 1 tablespoon of detergent to each load and says that only fresh detergent should be used. Detergent should also be stored in dry locations to ensure that it does not get damp.

Other Precautions

• To reduce or prevent soapy film on glasses, General Electric recommends making sure that the water temperature is at least 120 degrees and suggests turning on the kitchen faucet and letting it run until the water gets hot and then starting the dishwasher to ensure that the appliance’s water is hot. Also, don’t overload the dishwasher or allow large objects to block the detergent dispenser. If you have issues with soft water, wash glasses on the shortest cycle that will effectively clean them, and don’t use long, hot drying cycles.

Removing Soapy Film

• To remove soapy film on glasses, wash and rinse glasses, and then use the energy-saver or air-dry method. Then, pour two cups of white vinegar in a dishwasher-safe cup or glass, and place the container on the bottom rack. Allow the dishwasher to go through a complete wash cycle, again using the energy-saver drying method or air drying.