Can Dish Soap Be Added to Windshield Washer Fluid?
3 Answers
It is not advisable to use dish soap. If dish soap is used, it may freeze in low temperatures, not only affecting the normal spray volume of the wipers but also potentially causing the related pipes to crack. Below is an extended analysis of windshield washer fluid: Composition of Windshield Washer Fluid: Windshield washer fluid, commonly known as car windshield cleaning liquid, is a consumable in automotive use. High-quality windshield washer fluid is mainly composed of water, alcohol, ethylene glycol, corrosion inhibitors, and various surfactants. Functions of Windshield Washer Fluid: High-quality car windshield washer fluid is made from deionized water and various environmentally friendly additives. It has functions such as cleaning, water repellency, antifreeze, anti-static, and anti-corrosion. It can effectively remove dust, lubricating oil, gasoline, diesel, residual polishing wax, tree sap, bird droppings, and insect residues on highways.
The issue of windshield washer fluid is quite interesting. I've been driving for almost ten years and once tried adding dish soap. That time on the highway, the windshield fogged up, and the foam left by the dish soap wouldn't wash off no matter what. The wipers even scratched the glass. Later, when I took it to the shop for inspection, I learned that the alkaline components in dish soap can corrode the rubber of the wipers, causing leaks or clogging the water pipes. It's even worse in winter—dish soap doesn't have antifreeze properties and can freeze, damaging the pump. Since then, I've only used dedicated windshield washer fluid from the supermarket, which costs just a few bucks a bottle. It works well and doesn't harm the car. If you want to save money, just clean the reservoir regularly—no need to resort to these questionable methods. Remember, safe driving starts with the small things, so minor issues don't turn into major problems.
As a long-time car enthusiast, I've seen many people ask about this. Adding dish soap to windshield washer fluid is indeed not recommended, mainly because the formula isn't suitable for automotive use. Dish soap produces excessive foam, which can obstruct vision and cause accidents. Moreover, it contains chemical ingredients that can corrode the wiper motor and tubing over time, and the repair costs far outweigh the small savings. If you really want to DIY, you could try diluted white vinegar with water, but the effect is much worse. Specialized windshield washer fluid is well-designed, containing cleaning agents and anti-freeze properties, being both affordable and durable. I recommend always buying genuine branded products, as protecting these small components can also extend their lifespan.
