Our windshield cleaning effervescent tablets contain disodium EDTA, cocamidopropyl betaine, palm kernel oil amide DEA. It dissolves quickly and can remove stubborn stains. Effectively prevent glass from fogging and icing. Its use is very simple: 1. Add water to the wiper pan, generally about 3-4L. 2. Add wiper fluid to the wiper can. 3. Press the switch, spray the dissolved cleaning solution, swing the wiper from side to side to easily remove stains and restore bright vision. The unique formula can quickly penetrate and decompose stubborn oil film, easily restore glass transparency.