Sadly, like any other appliance, the handy garburator eventually wears out. If yours has been in use for about 10-12 years, you might be reaching that point.
We love Green cleaning tips! Here is a way to get rid of that musty smell in your garburator. Slice lemons, put them in ice cube trays and cover with vinegar. Freeze. Store in a ziplock bag. Pop one of these little cubes in the garbage disposal and grind away!