Pour 2 cups of ice and the rinds from two oranges or lemons into the disposal and grind. If you do not have the fresh fruit on hand, substitute for 2 cups orange juice or lemon juice. Including the ice while grinding creates a more substantial textures that allows the ingredients to work their way through the disposal more slowly, thereby giving you a more thorough cleaning.
Pour 2 cups baking soda followed by 2 cups vinegar down the disposal, if the fruit and ice do not remove all of the odor. This combination foams and breaks apart any bacteria, making this a helpful cleaner for odors caused by fish or other raw meats.
Rinse about 2 quarts hot water down the drain when all odor is removed. This flushes out any leftover rind particles which prevents new bacteria from forming.