Can I Add Tap Water to the Windshield Wiper?
2 Answers
You should not add tap water to the windshield wiper; instead, use dedicated windshield washer fluid. Below are the specific functions of automotive windshield washer fluid: 1. Cleaning Performance: Windshield washer fluid is formulated with various surfactants and additives. Surfactants typically have functions such as wetting, penetrating, and solubilizing, thereby achieving cleaning and stain removal. 2. Antifreeze Performance: It significantly lowers the freezing point of the liquid, providing antifreeze effects and quickly dissolving frost. 3. Anti-Fog Performance: It forms a single-molecule protective layer on the glass surface. This protective film prevents the formation of fog droplets, ensuring the windshield remains clear and transparent with a clear field of vision. 4. Anti-Static Performance: After cleaning with windshield washer fluid, substances adsorbed on the glass surface can eliminate surface charges, offering anti-static properties. 5. Lubrication Performance: With higher viscosity, it provides lubrication, reducing friction between the wiper and the glass to prevent scratches.
I usually drive to and from work, and I often see people adding tap water to the windshield washer reservoir for convenience, but this is a big mistake. Tap water contains scale and minerals, which can clog the nozzles over time, leading to poor spray performance and ineffective dust removal, directly affecting driving safety. I remember once after adding tap water, the nozzle got stuck, and water leaked into the engine compartment during car washing, costing me over a hundred dollars in repairs. Now, I always use store-bought windshield washer fluid or distilled water mixed with a bit of cleaner. In the rainy season down south, rainwater might just barely suffice, but it’s absolutely not suitable for northern winters—sub-zero temperatures can freeze and damage the pump. Developing this habit saves a lot of hassle; just a few simple steps can prevent major troubles.
