Our Glass Hard Spot Remover Car Glass contain surfactants and alumina powder. It can clean and polish car glass, bathroom glass and other glass, making driving safer. Its use method is very simple: first clean the stains on the glass surface, squeeze the product on the sponge, wipe the wet glass surface evenly and repeatedly, and finally wipe it clean with a rag. It can enhance visibility at night and in wet weather, improve driver safety, and make wiper performance better