Why is my coffee maker not brewing or only brewing a partial cup?

If the coffee maker won't brew, ensure the handle is pushed down securely, check that the water reservoir is filled to the MAX line and properly seated, and make sure the frother is not currently in use. If only a partial cup is brewing, the exit needle may be clogged, the water reservoir may have been removed during brewing, or the coffee maker may need to be descaled. (Page 5)