Protect the Glass: Car effervescent washer not only suitable for cleaning car's glass, but also reduce friction, protect glass surface and extend the service life of wiper blades. Suitable for mirror cleaning, window cleaning and tile cleaning. Save Your Money: Our Versatile Effervescent tablets Tablets will help you to save costs.1 tablet+4L water= 4L windshield washer, you will get 240 liters of windshield glass washer. Fully dissolved without residue. [Convenient To Operate] Just put one piece of car windshield clean effervescent tablet into the wiper can, then pour proper amount of water, or you can dissolve the windshield cleaner with a small container, then pour the dissolved cleansing fluid into the wiper jar and fill it with water, this will dissolve faster and more thoroughly Environmental friendly Biodegradable, phosphate and fragrance free formula,no chemical bleach. Simple to use: Put a car windshield clean effervescent tablet into the wiper can, then fill it with water. Or first dissolve the windshield cleaner with a container, then pour the dissolved cleansing fluid into the wiper jar.