It is a detergent exclusive for electric kettle. Citric acid attached to kettle white accumulation. Clean water scum soil. How to use: Place the water in the inner container until the water level is full and put one package of the medicine. Play the lid. Connect the power supply (plug) and let it stand for about 1 hour. During washing, stick the attached seal on a prominent place so as not to use electric kettle. Remove the power supply (plug) and the lid, and discard the washing solution to the sink. When there is dirt remaining, scrape off with a sponge. After washing, wash the inside of the electric kettle 4 to 5 times. Depending on the type and degree of dirt it may not be taken.