Clean and purify, reduce friction between wipers and glass, and protect them. Instructions for use: This product is suitable for environments above zero degrees Celsius. Open the car hood, find the wiper, add a tablet, and wait for 5 minutes before using it normally. A regular tablet can be exchanged with 4L of water. According to the normal volume of the storage tank, it is a tablet that can replace traditional glass water and is superior to traditional glass water. Store 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.