Prevent your disposal drain from clogging by periodically running cold water and putting ice cubes or citrus rinds in the grind chamber. Some larger models can grind small bones and fruit pits. These hard materials will keep the grate clean and reduce odors from the drain. Another way to reduce odors is to pour a mixture of ammonia and warm water in the drain and let it sit for 30 minutes. You can also plug the sink with the stopper and then fill the sink with about one gallon of water, mix ¼ of baking soda to water, turn on the disposal, and remove the stopper. The high flow of water will flush food particles from the grinding chamber and help reduce odors. It is a good practice to disassemble your drain line and remove the sludge from the pipes every few years and to use an enzymatic drain cleaner to keep pipes clean.