Our windshield cleaning effervescent tablets contain surfactants, chelators and ethanol. It can quickly dissolve in water to form a transparent glass cleaning liquid, which is used to clean the windshield of a car. Its use is very simple: add water to the wiper pot, generally about 3-4L, add a wiper liquid sheet in the wiper pot, flip the switch, spray the dissolved cleaning solution, swing the wiper easily remove the stain, restore bright vision. And you can clean the glass.