I have used baking soda and vinegar before, similar to what you do when you need to clean off a flat top glass stove (which for anyone reading, is a total pain to deal with). We installed a garbage disposal I while back and I love it, I am actually amazed it still works. We use it all of the time and once we ended up accidentally disposing of a piece of silverware. We have to love it now, if it can handle food and metal it is solid!