How to Clean a Dishwasher Filter. Method 3 of 4: Cleaning the Exterior. Use a damp cloth to clean and wipe around the filter. You should be able to tell where the blockage is by the symptoms: slow or no draining indicates an issue in the dishwasher drain or drain hose, while lackluster cleaning points to clogged spray nozzles. Remove any foreign material you find to prevent it from blocking the drain. Remove and clean the dishwasher filter. Step 4: Perform a Check On the Drain Hose. Safety first! #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. 1. Advertisement. 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. “How To Clean Dishwasher Drain” – And restore normal functions: Step 1: Clean Dishwasher Drain Filter . 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. If your dishwasher is underperforming or not fully draining, there's probably a blockage somewhere. You may have to pull the dishwasher out or locate it under the sink. (Because vinegar is a great de-gunking dishwasher drain cleaner!) Once you've found it, loosen the pipe clamp and carefully disconnect the hose. Keeping Your Dishwasher Clean. Step 2 - Check the Dishwasher's Drain Hose. Not only is this necessary for cleaning the dishwasher, but it also reduces the chances of slipping and falling while working around the dishwasher. The dishwasher shares a drain with the kitchen sink, so if you have a garbage disposal, run it before washing the dishes to ensure that the drain is clear. Take this opportunity to clean any dirt build up on the spray arm and the inside of the dishwasher door. Inspect The Drain. The drain hose is the tube that links the dishwasher with your garbage disposal. Remove the bottom rack for easier access, then feel 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. Try to blow through the hose to make sure it's clear. Regularly cleaning the inside of your dishwasher is an easy way to help prevent odors and the build-up of detergent and minerals. How To Clean Your Dishwasher. Now it’s time to check the drain hose. Before you start cleaning you dishwasher, it’s a good idea to quickly check the area around the drain. 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