If you want to keep your garbage disposal clean and free from odours household weblog Turnstyle Vogue recommends making ice cubes with white vinegar and a slice of lemon in each cube.
Put these cubes in a freezer bag and you'll have enough to keep your disposal spic and span as well as fresh smelling for a while. Run one cube through the disposal each day.
Clean your Garbage Disposal With These! [Turnstyle Vogue]