Most coffeemakers include warming plates for the carafes, or pots. A warming plate keeps the pot and coffee warm while the unit is turned on, allowing users to access a warm cup of coffee well after the coffee has finished brewing. Coffee can drip onto a coffeemaker's warming plate during the brewing process or when the carafe is lifted on or off the warming plate, causing a burned-on residue from the heat generated by the warming plate. Cleaning this burnt residue is fairly simple.
Turn off and unplug the coffeemaker. Wait for the warming plate to completely cool before cleaning.
Combine warm water and a few drops of dish-washing liquid. Dip a clean, soft cloth or paper towel into the mixture and wipe the warming plate until the burned-on residue is gone.
Apply a small amount of vinegar to a cleaning sponge if the cleaning mixture does not remove the burned-on residue. Scrub gently to remove the residue.
Dampen a clean cloth or paper towel with water and wipe the warming plate.
Allow the warming plate to air dry completely, or dry it with a towel before turning the coffeemaker on.