The problems that can occur with a Keurig brewer include coffee ground deposits falling into the cup, partially filled cups, brewer malfunctions and scale buildup from hard water. Keurig acknowledges that scale deposits reduce the efficiency of the machine and negatively affect the taste of the coffee or tea.
Keurig suggests using bottled or filtered water with the brewer to combat scaling. The company also recommends against using softened or distilled water. If a brewer is used with hard water, descaling needs to be performed every three to six months. The Keurig 2.0 brewer is programmed with a descaling reminder, which is triggered after a certain amount of water passes through the system. The reminder only disappears after the descaling has been performed.
K-Cup brewers can accidentally deposit coffee grounds in the brew cup as a result of grounds collecting in the machine’s exit needle. After removing and cleaning the exit needle, Keurig recommends using the machine’s cleansing brew settings to clear out leftover grounds. If a brewer is not filling a cup to the desired level, it may also be an issue that requires cleaning the exit needle or descaling the equipment. Removing the water reservoir during the brew process can also result in a short cup.
Using distilled or cold water can stop the brewing process on the Keurig MiniPlus. To fix this problem, Keurig recommends emptying the internal hot water tank and using bottled water.