Urnex Coffee Machine Descaling Liquid effectively breaks down limescale for better-tasting coffee and more consistent machine performance. It removes mineral scale that builds up on the heating element of every coffee maker. Great for use with single-cup brewers and automatic drip machines. Bottle is suitable for three uses. Use every three months for best results. Application: Coffee Machines Dirt Types: Mineral Scale Physical Form: Liquid Packing Type: Bottle.