What Causes Windshield Washer Fluid to Disappear Without Reason?
3 Answers
Windshield washer fluid disappearing without reason is typically due to a leak in the washer fluid reservoir. Windshield washer fluid, commonly known as car windshield cleaning fluid, is a consumable item in vehicle use. It usually functions to moisten, penetrate, and solubilize, thereby aiding in cleaning and removing dirt. Due to the presence of alcohol and ethylene glycol, it significantly lowers the freezing point of the liquid, providing anti-freezing properties and quickly dissolving frost. It is not advisable to replace windshield washer fluid with water, as ordinary tap water contains more impurities. Over time, these impurities can adhere to the rubber hoses, affecting normal spraying. Long-term use may increase friction between the glass surface and the wiper blades, potentially causing scratches on the glass.
I also encountered the situation where the windshield washer fluid inexplicably decreased before, and later found out there was a crack at the bottom of the reservoir. It's quite common for plastic parts to age after five or six years of driving. Especially in winter when the water freezes and expands, coupled with vibrations from bumpy roads, it's easy to develop small cracks. You can crawl under the front of the car and use a flashlight to inspect around the reservoir. If you see damp water stains, it's likely leaking. Additionally, loose connections at the hose interfaces connected to the nozzles might also cause seepage. This kind of issue doesn't require replacing the entire reservoir; just take it to a repair shop, have them disassemble it, and apply some sealant for about twenty bucks to fix it. If the windshield washer fluid is blue, it's very noticeable when leaked on the ground, so pay attention to whether there are any stains in your parking spot.
In my experience, the disappearance of windshield washer fluid is mostly due to leaks, but some people overlook usage habits. For example, frequently spraying the windshield during rainy days can deplete the fluid without realizing it. Cars with automatic headlight washers also consume a lot of fluid, as they spray once every time the lights are turned on. Additionally, the rear window nozzle has a surprisingly high flow rate, and a few uses can empty the reservoir. It's advisable to note the refill date; if the reservoir empties within two or three days, it's definitely abnormal. The simplest detection method: after filling the reservoir, lay a sheet of newspaper under the car and check its dampness the next morning to determine if there's a leak.
