This water soluble tablet made with scientific cleansing solution will clean all the dirt and spots on your windshield. 1 tablet when dissolved in water makes 4 liters of cleansing solution. Easy to use and designed specially for windshield cleaning. The water turns light blue when tablet is dissolved giving a fresh look while you spray. It also has antifreeze which helps to reduce fog in winters. USE METHODS : Open glass bottle cover , put into a grain of block concentrated. Fill up claar water ( recommended tap water ). Lid reset. Maintenance wiper windshield,very important is glass water add wiper fine , regular and glass cleaning wiper,concentrated block cleanser,not only have cleansing effect , also lubricates the glass,greatly reduce the wiper blade and glass friction force,full protection for good glass surface,extend wiper blade service life . glass dry scraping avoid ! Cars ride ability traders rain wiper process,as found in a slight wiper noise, Please spray on water wiper,can in to lubricate the role of,and clean glass surface murky.regular maintenance,let your wiper outperforming.