What is the purpose of adding windshield washer fluid to a car?

[EmiliaFitz]

The functions of adding windshield washer fluid to a car include: 1. Cleaning: It has wetting and penetrating properties, which help in cleaning and removing dirt; 2. Anti-freezing: It significantly lowers the freezing point of the liquid, providing anti-freezing effects; 3. Anti-fogging: It forms a single-molecule protective layer on the glass surface, preventing the formation of fog droplets and ensuring the windshield remains clear and transparent, with a clear field of vision. The method for adding windshield washer fluid to a car is: 1. Turn on the wiper switch, and the windshield washer fluid will spray from below the front windshield; 2. Continue until the spray nozzle stops spraying, then open the windshield washer fluid filler cap and add the fluid; 3. Turn on the wiper switch again to clear out any remaining windshield washer fluid; 4. When no more fluid sprays from the nozzle, add the windshield washer fluid and securely close the filler cap when done.