Aquapel 5xAquapel Glass Treatment (5 Pack) Drastically improves visibility in rain and forms a chemical bond with automotive glass and creates a rain repellent shield. Makes it easier to clear ice, snow, and even dirt and bugs. Offers a long lasting 4 to 6 months protection. Passiondetailing recommends a biannual treatment. One by the beginning of summer and another one mid autumn, just before snow invades! Application: Thoroughly clean (water and soap) and dry