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Automatic Dishwashing Problems, Causes and Solutions

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Problem Causes Solutions Preventive Measures
Yellow or brown stains on dishes and/or dishwasher interior Iron or manganese content in water supply. After food soil is removed, wash dishes with citric acid crystals. Check dishwasher manufacturer's instructions for amount to use and method. Do not add detergent.

A liquid product is available to remove iron deposits from the dishwasher interior; follow the package instructions.

To retard staining, use maximum amount of dishwasher detergent to keep iron or manganese in suspension during the wash. Use a rinse additive during the rinse.
If staining cannot be controlled, the only solution is in the installation of iron removal equipment in the home water supply.