*Practical tool: this car windshield effervescent tablet can help you a lot, just 1 piece tablet with 4 liters of water, you will get 4 liters of windshield glass washer, giving a cleanup to glass, greatly reducing the friction of the wiper blade and glass, and comprehensive protection to meet your long-term needs *Versatile: our versatile effervescent tablets are not only suitable for automotive glass, but also practical for kitchen use, it is versatile that removes the kitchen stains and floor stains well *Effective performance: this washer tablet has strong dirt removing performance, can effectively remove the harmful and stagnant dirt even if it is invisible *Space saving: this car effervescent tablet is only about 0.6 inches/ 1.5 cm in diameter, each car effervescent tablet has its own packaging, which is more space-saving and easy to carry compared with the traditional ones *Simple to use: just put a car windshield effervescent tablet into the wiper can, then fill it with water, or first dissolve it with a small container, then pour the dissolved fluid into the wiper jar and fill it with water, this will dissolve faster and more thoroughly