Over time, minerals from water accumulate inside your coffee brewer’s boiling element, forming scale. This buildup can slow and eventually stop water flow, affecting the brewing temperature and saturation time. If not descaled regularly, the brewer can become permanently damaged. Urnex BioCaf Coffee Equipment Descaling Powder is a biodegradable, phosphate-free, non-toxic descaler that removes limescale buildup for optimal machine performance and better-tasting coffee. Unlike vinegar, this product rinses easily and does not leave behind any odors. Each carton contains two single-use packets of descaling powder.