Soak your coffee pot in a basin or sink filled with equal parts water and white vinegar at least once a week. Let the pot soak for 30 to 45 minutes.
Wash the coffee pot with liquid dish soap and water, as you normally would.
Pour white vinegar into the reservoir on your coffee maker and run it through the coffee cycle two to three times. Flush the coffee maker with water several times before making coffee. The combination of using vinegar on the pot and in the maker itself regularly will prevent the buildup of scale.