Advertisement. Regularly cleaning the inside of your dishwasher is an easy way to help prevent odors and the build-up of detergent and minerals. Use a damp cloth to clean and wipe around the filter. “How To Clean Dishwasher Drain” – And restore normal functions: Step 1: Clean Dishwasher Drain Filter . Note: If the hose is blocked, look for any kinks in the hose and straighten them. Loosen the dishwasher drain hose clamp and disconnect the drain hose (usually it's the one with ridges) from the pump. The first step in cleaning a dishwasher drain is to empty the dishwasher, remove the cleaning racks and dishwasher filter. Method 3 of 4: Cleaning the Exterior. Remove any foreign material you find to prevent it from blocking the drain. 1. If your dishwasher is underperforming or not fully draining, there's probably a blockage somewhere. How To Clean Your Dishwasher. Remove and clean the dishwasher filter. Step 4: Perform a Check On the Drain Hose. Step 2 - Check the Dishwasher's Drain Hose. Try to blow through the hose to make sure it's clear. Remove the bottom rack for easier access, then feel the area around the drain. You may have to pull the dishwasher out or locate it under the sink. Take this opportunity to clean any dirt build up on the spray arm and the inside of the dishwasher door. Once you've found it, loosen the pipe clamp and carefully disconnect the hose. Check the Drain Hose. In a small bowl, pour 1/4 cup (32 g) with 4 cups (950 mL) of hot water, then stir them together to form a creamy paste. 1. How to Clean a Dishwasher Filter. Before you start cleaning you dishwasher, it’s a good idea to quickly check the area around the drain. Remove the bottom rack of the dishwasher and locate the filter—a cylindrical tube that twist-locks into place—on the floor of the unit. Start by removing any food waste that may be present at the bottom of your dishwasher. If your dishwasher is clogged, you may need to clean the dishwasher drain. The drain hose is the tube that links the dishwasher with your garbage disposal. Not only is this necessary for cleaning the dishwasher, but it also reduces the chances of slipping and falling while working around the dishwasher. (Because vinegar is a great de-gunking dishwasher drain cleaner!) Whether you use a dishwasher cleaning tablet or clean your dishwasher with vinegar and baking soda, repeat the following steps every 30 days to keep your dishwasher running efficiently and your family’s dishes sparkling clean. Mix baking soda with hot water to make a cleaning solution. Safety first! Use the toothbrush and some soapy water to clean the drain located at the bottom of the dishwasher. #2 – Fill the detergent and the drying-agent dispensers with white vinegar, then run the dishwasher empty on the pots-and-pans cycle — to keep the dishwasher drain lines clean and free-flowing. Keeping Your Dishwasher Clean. 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