The best-known rule for eliminating garbage disposal order is to run cold water while it’s on--this also helps in easing the food-grinding process, and cooling off the disposal to stop it from overheating, Common household deodorizing methods include pouring baking soda and vinegar into the disposal, or grinding up ice cubes and vinegar if your disposal is powerful enough to break ice without overheating. After either step, it’s recommended to fill the sink with 3-4 inches of water, thus “soaking’ the disposal, and then activate it while the water drains--this clears away the dislodged debris. Many people also recommend grinding up citrus fruit slices or peels in the disposal.
Some experts also recommend washing or soaking the disposal and sink with dish soap or another biodegradable cleaning solution – always mixed with cold water.
If simply washing the blades of the unit and deodorizing the upper portion doesn’t work, you could have debris clogged in the unit or the pipes, and might need to clean them separately.