The dishwasher interior is self-cleaning. If a stain does occur, clean with dishwasher detergent & water, wearing rubber gloves to protect hands from very alkaline detergent. A heavy film buildup from hard water minerals may be removed by adding vinegar or citric acid crystals (buy at drugstore) to dishwasher without any dishes in it, after it fills with water at start of first cycle. Do this only if appliance manual suggests this is OK & if the buildup bothers the owner (as it does no harm). However, very hard water can deposit mineral film on dishes, glasses & flatware & on dishwasher pump & moving parts; it is wise if water if very hard to install a water softener before installing a dishwasher.

If iron in water causes rust stains inside dishwasher, buy a commercial soluble rust remover (grocery or hardware), checking label to be sure it can be used for the dishwasher. Start empty dishwasher on rinse cycle. As it fills, open & add 1/2 cup rust remover. Let dishwasher complete cycle. If iron problem continues so that another treatment is required, better to install an iron filter in water system to remove iron as this will affect dishes, laundry & all fixtures.

Related Plumbing Article • cleaning tips for bath & kitchen

Plumbing Tools & Materials • rubber gloves • dishwasher detergent • vinegar or citric acid crystals • commercial soluble rust remover • water

Difficulty: Beginner

Repair Time: 15min

Advice by Friendly Plumber ® • Wear rubber gloves & ensure your work area is well ventilated