Rather than blades, garbage disposers have a ring of tooth-like shredders that tear into food particles. To keep this appliance working through big holiday meals, give the shredders a good cleaning beforehand. Combat odor-causing bacteria with cubes of frozen white vinegar. Toss a few down the drain, and, with the cold tap turned on, run the disposer for about a minute to remove built-up food and grease residue. Mix in a few citrus peels to leave the disposer smelling fresh.