Can I put water in my wiper fluid?

It is not recommended to use water instead of special windshield washer fluid. Although using plain water for short-term emergency purposes may not cause immediate problems, long-term use can pose various risks. Professional windshield washer fluid contains ingredients such as deionized water, ethanol, ethylene glycol, and surfactants. It not only effectively removes oil stains and bug residues but also provides anti-fogging, anti-static, and lubrication for the wiper blades, while preventing nozzle clogging. Ordinary tap water contains minerals that can form deposits and potentially clog precision nozzles. Additionally, the absence of anti-corrosion properties accelerates the deterioration of wiper blades. For cost considerations, concentrated windshield washer fluid can be diluted for use, with a cost of approximately 3 to 5 ringgit per liter. This approach maintains cleaning effectiveness while prolonging the lifespan of the fluid system. Notably, during rainy seasons, the water-repellent properties of professional windshield washer fluid can enhance visibility by approximately 40%, significantly improving driving safety.