In-sink garbage disposals are gross, wet and they smell bad over time. You can clean them out, however, with some lemon and vinegar ice cubes.
The cubes only take a few minutes to make. Cut up some lemons and place a piece in each section of an ice cube tray. Fill them up with vinegar (no water) and freeze. Then, whenever you need to clean your garbage disposal, toss a few in and turn it on. The cubes will help clean out the muck-filled disposal as well as mask any odours making their way out of the sink.
Clean Your Garbage Disposal with Lemon and Vinegar Ice Cubes [One Good Thing]