Zep Solar Panel Cleaner 1Ltr (678CH) is a specially formulated liquid solution designed to remove tough grime, bird droppings, and air pollution deposits from solar panels. Its powerful degreasing properties ensure panels remain at peak efficiency, while the fast-drying, non-streak formula leaves surfaces spotless and residue-free. Ideal for bi-annual maintenance, this cleaner maximizes energy absorption and extends the life of your solar panel investment. High-Performance Degreasing Action for Maximum Efficiency: This solution breaks down and lifts stubborn bird droppings, grime, and pollution buildup, helping maintain optimal energy output from your solar panels. Streak-Free, Fast-Drying Finish: Leaves your panels looking professionally cleaned with a crystal-clear surface .