Load your dishwasher properly following manual suggestions. Use only dishwasher detergent in recommended amounts. Do not put any other cleaning compound inside dishwasher, as it may interfere with dish washing action. Store detergent in a dry, cool place, and do not keep extra packages on hand for a long time as detergent takes up moisture from the air and then loses cleaning ability.
A dishwasher should always be plugged into a grounded outlet; do not use an extension cord. If hot water has not been used in house for two weeks or longer, open all hot water faucets and let them run for several minutes before using the dishwasher or any other electrical appliance connected to hot water. Do not smoke or light any flame while the faucets are running; hydrogen gas which is flammable and explosive may build up in the water heater and hot water pipes if hot water is not used for a long time. If a seasonal home is to be closed without heat for winter, winterize the dishwasher.
If iron in the water causes rust stains inside the dishwasher, buy a commercial soluble rust remover (at a grocery or hardware store), checking the label to be sure it can be used to dishwasher. Start the empty dishwasher on rinse cycle. As it fills, open and add 1/2 cup rust remover. Let the dishwasher complete its cycle. If iron problem continues so that another treatment is required, it is better to install an iron filter in your home water system to remove iron as this will affect dishes, laundry, and all fixtures.
This article has been contributed in part by Michigan State University Extension.
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