Mix ½ cup baking soda with 1 cup warm water. Using a funnel, slowly pour it into the hose from the disposal end (disconnect the hose clamp if needed—you can leave the dishwasher end connected).
Wrap a rag around the vacuum hose to create a tight seal with the dishwasher drain hose. how to clean dishwasher drain hose without removing it
Pour 1 cup white vinegar into the same end. Immediately cover the opening with a rag or your hand (it will fizz vigorously). Mix ½ cup baking soda with 1 cup warm water
