The most-used appliance that has the shortest lifecycle is the coffeemaker. The reason why is simple: They get used often, and they are usually left on for hours at a time. To maximize the lifespan, clean it by mixing equal parts water and white vinegar in the coffeepot, and run it through the whole process, as if you were brewing a pot of joe. This removes trace minerals and buildup inside. Then run a whole pot of regular water to remove the faint taste of vinegar. If you can, don't allow a freshly made pot of coffee to sit on a burner all day long; this wastes energy and wears out the machine.