Can Tap Water Be Used as Windshield Washer Fluid in Summer?

[AustinLee]

In summer, tap water should not be used as a substitute for windshield washer fluid. Windshield washer fluid is primarily composed of water, alcohol, ethylene glycol, corrosion inhibitors, and various surfactants. Its functions include cleaning performance, antifreeze properties, anti-fog capabilities, anti-static effects, lubrication, and anti-corrosion protection. Using water instead of washer fluid can only remove dust superficially and lacks the ability to thoroughly clean stubborn dirt or insect residues on the windshield. Regular tap water contains numerous impurities that, over time, can accumulate in rubber hoses, leading to clogged nozzles and tubing. Prolonged use may increase friction between the glass surface and wiper blades, causing scratches on the windshield and shortening the lifespan of wiper blades.