A.B.
I use the garbage disposal cleaner packets when it's bad, and they work very well. I think they're called something cheesy like "Disposer Magic" or something like that. I also noticed last time I bought dish detergent that they have a new brand of disposer cleaner from one of the dish companies (I think Cascade), and they were selling it near the dishwasher detergent. Also, I sometimes coat ice cubes with dish soap and run the disposer and/or put lemons, limes or oranges down it.