Protect and restore your Windshield! 😎 Please read! It is used for the automotive windshields glass, window glass, and back mirrors. Also glasses in the house and office How to use? Office & Home One piece can be added to 2-4 liters of tap or purified water. Use 2 tablets for best effects. Vehicles Put 1 tablet directly to wiper pot, fill it with water. Use it after 20 mins. Cautions 1. Beware splashed into the eyes. 2. Keep it far away from children