When our garbage disposal smells, 90% of the time it is because there is something nasty on the underside of the rubber around the hole (does that make sense?). I take a rag, put my hand down the hole and wipe the underside of the rubber. It is usuallycovered with some gross, unidentifiable substance that just reeks. I'm guessing it is a result of splatter from running the disposal, and it doesn't get clean becasue it is on the wrong side of the running water. Try that and see if it helps.
Mamma to a pretty little princess 3/06, a long awaited blessing 6/11, and a sweet surprise 11/13!