Vinegar, baking soda, lemon peels and unsweetened lemonade mix are all effective in neutralizing dishwasher odors. There are also cleaning techniques that can help reduce dishwasher odors.
To neutralize dishwasher odor, fill a 1-cup measuring cup with vinegar, baking soda, lemon peels or unsweetened lemonade mix. Place the cup in the top rack of an empty dishwasher, and run the dishwasher on normal settings.
Experts also recommend running and cleaning the garbage disposal as a method of eliminating dishwasher odor. The garbage disposal hose can be disconnected and cleaned with a cloth attached to a stiff wire. The dishwasher seal or door gasket can also be a source of odor and should be cleaned regularly.
The drain filter at the bottom of the dishwasher can also retain odors. Clean the filter once a month with warm, soapy water.