The buildup of mineral scale is a threat to the performance and durability of coffee and espresso machines. Mineral scale buildup can impact your machine's boiler, preventing water from reaching its optimal brewing temperature. At insufficient temperatures, it is impossible to extract the full flavor from your coffee beans. Mineral scale buildup can also clog water flow, and if not removed, can cause a machine to stop working. Descaling powder removes the mineral scale buildup that forms on the heating element of all coffee equipment. Urnex descaling powder is odorless and rinses away thoroughly, unlike vinegar which can be difficult to rinse, takes longer to be effective, and leaves behind an unpleasant odor and aftertaste that affects the aroma and taste of your coffee. Effectively breaks down limescale for better-tasting coffee and more consistent machine performance. Descaling powder removes mineral scale that builds up on the heating element of every coffee maker. Single-use packets of coffee and espresso machine descaling powder. Formulated from environment-friendly and phosphate-free ingredients. For use, dissolve one packet of descaling powder into 32 oz. of lukewarm water, pour the descaling solution into the machine's water reservoir, brew a full tank of the descaling solution and discard, refill the water tank with fresh water and brew a full tank; repeat this step two more times to clear the machine of any descaling solution. Capacity: 1 oz. each. Three packets per box. Use every three months for best results