Elbow Grease All Purpose Descaler Sachets remove 100% of limescale and improves performance to your household appliances in as little as 10 minutes! Coming in a great value pack of 3, the powerful limescale formulation removes up to 100% limescale from small household appliances such as coffee machines, kettles, irons and shower heads. Limescale doesn't just look unpleasant, it reduces performance which ultimately shortens your appliance's life and makes it more costly to run. It is important to descale appliances every 3 months in hard water areas, and every 6 months in soft water areas.