Function: Clean and decontaminate, reduce the friction between the wiper and the glass, and protect it. Instructions for use:This product is suitable for above zero degrees Celsius. Open the hood of the car, find the wiper, add a piece of wiper (if the glass is too dirty, it is recommended to add 2 pieces), wait for 5 minutes and then use it normally. A piece of conventional water can be exchanged with 4L of water. According to the normal volume of the liquid storage tanks, it is a piece of water, which can replace and be superior to traditional glass water! alert: This product should be stored in a cool dry place to avoid contact with children. Do not swallow! This product can not be used for antifreeze glass water! Only the cleaning function does not have antifreeze function.