If after descaling but Keurig descale light is still on and coffee maker is still not brewing, you may need to check the machine with its needles for debris that may have lodged to the needles. To fix this simply press and hold down both the 8 oz. buttons and 10 oz. buttons of the machine for about 3 seconds. This will turn off descaling light on Keurig machines. However, if descaling light is still on, it probably means that it was not completely rinsed off from the descaling solution. Make sure to flush the machine with clean water by simply removing the water tank of the machine and then fill it up with tap water (must not exceed max mark) and then rinse coffee machine with fresh water.