Coffeemakers tend to have a shorter lifecycle than most other small kitchen appliances.
It's no wonder since they are used the most and left on for long periods of time. To get
the best life from a coffeemaker, give it a routine cleaning by processing a solution of
equal parts of white vinegar and water, followed by a couple of clear water rinses. This
will help to remove mineral build-up that can hamper efficient operation.
When a coffeemaker is equipped with a variable auto shut-off, shorten that period if you
can. There's no sense keeping the coffee hot and the heating element working for four
hours, if you have no intention of drinking coffee that has been sitting for that long.