Over time, minerals from water accumulate inside the Moccamaster’s boiling element, forming scale. This buildup can slow and eventually stop the flow of water. It also can affect the brewing temperature and saturation time. If not descaled regularly, the brewer can become permanently damaged. Descaling products break down the mineral buildup inside your brewer, ensuring consistent brewer functionality and great coffee. Descale your brewer every 100 cycles, or a minimum of every three months. An excellent way to remember is by descaling after you finish a box of 100-count filters.