How to clean your dishwasher: Clear the drain: Remove the bottom dish rack. Inspect the dishwasher drain, removing any gunk or food caught there. Put vinegar in dishwasher: Start with an empty dishwasher. Baking soda rinse: Sprinkle one cup of baking soda across the bottom of the dishwasher. Click to see full answer. Accordingly, how do you clean a dishwasher drain line? Method 2 Unclogging the Drain Remove the bottom rack from the dishwasher. Unscrew the drain catch and filters. Use a straightened wire hanger to remove the clog. Pour a baking soda and vinegar mixture down the drain. Let the mixture sit in the dishwasher for 10-15 minutes. Similarly, can you put drain cleaner in a dishwasher? When you pour a drain cleaner into your dishwasher, residue from the cleaner could remain after unclogging the drain and washing the inside of the appliance. The drain cleaner could also damage the drain hose, or other parts of the dishwasher, which could lead to leaks and other mechanical problems. Secondly, how do you clean a dishwasher with vinegar and baking soda? Drop ¼ cup of baking soda down the drain and turn on the garbage disposal for a few seconds. Allow baking soda to sit for 10 minutes. Add 1 cup of vinegar. Here is how: Remove the bottom rack of the dishwasher to access the drain. Place a cup of vinegar on the upper rack and run a hot water cycle in an empty dishwasher. How do you unclog a dishwasher with baking soda?First, pour a solution of baking soda and vinegar down the basket at the bottom of your dishwasher. After letting it settle for 10-15 minutes, pour a pot of boiling hot water down the basket and see if that clears the clog.