5 x unpackaged Kettle Scrubs!Simply drop a Kettle Scrub into your kettle and let it fizz in the water to help irritate the limescale build up.After 1 hour discard of the water in the kettle, along with any limescale residue. Be sure to fill the kettle with water and reboil. Repeat by refilling & reboiling once more before using the kettle!Do not mix with other cleanersKeep out of reach of children & animalsAlways be careful when using hot water(Citric Acid) DO NOT MIX WITH OTHER PRODUCTS. PLEASE KEEP OUT OF REACH OF CHILDREN AND ANIMALS. ALWAYS BE CAREFUL WHEN USING HOT WATER.WARNING: Causes serious eye irritation. Keep out of reach of children. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice/attention.