How do I descale my DCF6212TTC or DCF6214T drip Coffee Maker?

The cleaning light is blinking and the unit needs to be descaled:

• Pour 3.5 ounces of descaling solution into the carafe and fill with water to the 4 cup level.
• Pour this mixture into the unit's water tank.
• Place the carafe in the unit and push the “clean button ".
• The program for descaling will start.
• The mixture will clean inside and drip back in to the carafe.
• When this stops, empty out the carafe and fill with clean fresh water.
• Pour the water into the tank and press the clean button.
• Place the carafe back in the unit.
• This will start the rinsing cycle and you will need to repeat these steps 3 times using the fresh water BEFORE brewing coffee.
• At the end of the third rinse, push the on/off button twice in order to clear the clean alarm