Can water replace windshield washer fluid in summer?
2 Answers
Windshield washer fluid cannot be replaced with water in summer because it is mainly composed of water, alcohol, ethylene glycol, corrosion inhibitors, and various surfactants. If water is used as a substitute for windshield washer fluid, it can only clean dust simply and lacks the ability to thoroughly remove dirt and insect residues attached to the windshield. Additionally, ordinary tap water contains many impurities, which can accumulate in the rubber hoses over time, leading to clogging of the nozzles and pipes. Long-term use may increase friction between the glass surface and the wiper blades, causing scratches on the glass and shortening the lifespan of the wiper blades. The main functions of windshield washer fluid include: 1. Cleaning performance; 2. Anti-freezing performance; 3. Anti-fog performance; 4. Anti-static performance; 5. Lubricating performance; 6. Anti-corrosion performance.
As an experienced driver who often washes my own car, I recommend not using water as a long-term substitute for windshield washer fluid, especially in summer. Last week, I used tap water for convenience, only to end up with water stains all over the windshield and squeaky wipers. A mechanic later explained that the minerals in hard water can clog the washer nozzles, and more importantly, ordinary water can't dissolve the residual bug splatter and tree sap. This becomes particularly dangerous on highways when your windshield gets smeared with insects—using plain water only makes visibility worse. In a pinch, you can use distilled water with a bit of dish soap for a couple of days, but remember to switch to antifreeze washer fluid before autumn. Otherwise, residual water can freeze and crack the washer lines.
