Use methods.Open glass bottle cover put into a grain of block concentrated.Fill up clear water ( recommended tap water ). Concentrated super auto glass cleaner than conventional glass water unique:the following wiper windshieldvery important is glass water wiper fine regular and glass cleaning wiperconcentrated block cleansernot have cleansing effect also lubricates the glassgreatly reduce the wiper and glass friction forcefull for good glass surfaceextend wiper service life . glass dry scraping avoid ! Cars rideability treaders rain wiper processas a slight wiper noise pls spray on water wipercan in to lubricate the role ofand clean glass surface murky.regular maintenancelet your wiper outperforming. 2 x Windshield Washer Screen Wash Wiper Cleaner Washer Concentrate Performance efficient a grain of 4 liter equals to general water wiper. Somatotype small portable with milk film general size Item Type: Window Cleaning Special Features: Car window cleaning Item Volume: 2pcs Material Type: concentrate Item Weight: 3g/1Pcs Color:White(shown as the pictures) 1 piece 4 liters of water Cleaning strong capacity. Use convenient rinse block plus concentrated use