Keep your appliances in good working order with Scale Away Descaler Liquid. Scale can affect many household appliances by building upon electrical elements and blocking vital parts, thus making the appliances less effective, more costly to run, and shortening the element life. How to use: Kettles: Add 500ml cold water and 75ml of Scale Away and leave for 30 minutes. Empty and rinse the kettle twice before use. For larger kettles, increase the dose. Coffee and Tea Makers: Add 500ml cold water and 75ml of Scale Away to the appliance and turn it on. Once complete, flush the appliance by running 2 full loads of fresh water. Irons: To be used only on the outside of Irons. External Use: For use on the outside of Kettles, Irons, Coffee and Tea Machines and Shower Heads: Wearing gloves, apply Scale Away to clean cloth and wipe directly onto limescale areas. Rinse immediately after use.