Another thing I do with the garbage disposal to help clean it is pour some baking soda down it, let it sit for a bit and then add some vinegar that I boiled in the microwave. You will hear it fizz. Be careful after pulling the vinegar out of the microwave as the smell is extremely strong so don't put your face over it and breath in. After the fizzing dies down, I run hot water while the disposal is turned on. It suppose to help clean as well as be good for keeping drain clear.