Insert a narrow, flexible brush into the hose opening. Work it back and forth, rotating as you go. This will dislodge stuck debris without needing to remove the whole hose.
The fizzing action will loosen debris. Keep the hose elevated. how to clean dishwasher drain hose without removing it
Pour one cup of baking soda directly into the drain at the bottom of the dishwasher, followed by one cup of white vinegar . Insert a narrow, flexible brush into the hose opening
Remove the bottom rack and clear any standing water from the dishwasher tub using a cup or turkey baster. The fizzing action will loosen debris
After waiting, use a pitcher of hot (not boiling) water to flush through the hose. If connected to a disposal, run the disposal with cold water to help push everything through.
After vacuuming, pour hot water through the hose to confirm it flows freely.