What Causes a Heavy White Film From a Dishwasher?

Detergent Problems

• Dishwasher manufacturers generally recommend the type of detergent you should use for best results. Always follow these recommendations to avoid cleaning problems and issues with film left on dishware. Government regulations have removed the phosphates from dishwasher detergents. These phosphates helped to remove mineral deposits left on dishware from heavy water. Without the phosphates, you may see additional problems with heavy film on dishes. Remove the film with periodic additions of citric acid to the dishwasher, according to the ApplianceRepairIt website.

Lime Deposits in Dishwashers

• The water in some areas of the country may contain large amounts of calcium. This type of water can leave lime deposits on glassware, silverware and internal walls of the dishwasher tub. Pour a gallon of vinegar into the bottom of the dishwasher tub and run a normal cycle to remove these deposits. Always use a rinsing agent in your dishwasher to prevent water spots on dishes. Citric acid is available at health food stores or home brewery supply stores. It is a common ingredient in candy making. You can also use a packet of unsweetened lemonade powdered drink mix, which contains citric acid, in the dishwasher. Do not use any other type of drink mix because the colors will dye the inside walls of your machine.

Etching On Glassware

• Hard water deposits may form on glassware, leaving a cloudy film. Rinse these items with apple cider vinegar to remove the deposits. A permanent, heavy white film on glassware may be "etching," a permanent condition that damages the surface of the glassware. Unfortunately, you cannot remove this damage cannot. Prevent future etching problems by reducing the amount of detergent you use with each wash and avoiding pre-washing cycles.

Preventing Dishwasher Film Problems

• To prevent film on dishes and other problems from automatic dishwashers, follow manufacturer's directions carefully on stacking, pre-washing and type of detergent. Use a recommended rinse-aid. Clean your dishwasher regularly with vinegar or citric acid to prevent lime deposit buildup. If films on dishes are a continuing problem, consider installing a water softener unit to the water source.