Instructions for useThis product is suitable for above zero degrees Celsius. Open the hood of the car, find the wiper tank, fill the tank with water, 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 tank, it is a piece of water, which can replace and be superior to traditional glass water!This product is a high-performance cleaning agent.This product has a lubricating effect on the wiper rubber skin and has anti-aging function to maintain flexibility and prolong its service life.Package Included6* concentrated wiper