Our glass oil film cleaning tablets contain sodium bicarbonate and citric acid. It can quickly remove the oil film on the windshield and improve driving safety. Its use method is very simple: take the effervescent tablet into the right amount of water to dissolve; Apply the foam cleaner evenly to the surface of the windshield; Gently wipe the windshield with a tool to help remove oil film and dirt. Rinse with water. And it can improve the surface activity and remove the oil film quickly.