can you put windex amd water in your car

[Myrtle]

No, you should not put Windex and water in your car's windshield washer fluid reservoir. While it might seem like a convenient alternative, using Windex—or any ammonia-based glass cleaner—can damage critical components of your vehicle's washer system and is ineffective for safe driving.

The primary risk comes from the ammonia found in many glass cleaners, including some Windex formulas. Ammonia is highly corrosive to rubber and plastic parts. Over time, it can degrade the rubber seals in the washer fluid pump, the plastic tubing that delivers the fluid, and the nozzles that spray it onto your windshield. A failure in any of these components can lead to costly repairs. Furthermore, a simple water and Windex mixture lacks the necessary additives for real-world driving conditions. It offers no protection against freezing in cold weather, which can crack the reservoir and lines, and it doesn't contain detergents to effectively break down stubborn grime like bug splatter and road film.

For safe and effective cleaning, always use a dedicated automotive windshield washer fluid. These formulas are specifically engineered to be safe for your vehicle's system while providing essential features like freeze protection, grime-cutting detergents, and water-beading agents for a clearer view.

Feature	Windex & Water Mixture	Dedicated Automotive Washer Fluid
Ammonia Content	Often contains ammonia, which is corrosive	Ammonia-free, system-safe
Freeze Protection	None, water freezes at 32°F (0°C)	Can protect down to -20°F (-29°C) or lower
Cleaning Additives	Basic; struggles with bug residue and road tar	Specialized detergents for tough grime
Component Safety	Damages rubber seals, plastic, and pumps over time	Formulated to be compatible with all materials
Water Beading	Minimal effect on water repellency	Often includes surfactants for better visibility in rain

[OEmersyn]

Definitely not. I learned this the hard way on my old truck. I used a Windex mix for a few months and the pump started sounding weak, then quit entirely. The mechanic showed me the hoses—they were getting soft and gummy from the ammonia. It ended up costing me over a hundred bucks to fix. Just grab the proper blue fluid from the gas station; it's cheaper than a repair.

[DeEmma]

It's a bad idea that can lead to expensive problems. The chemicals in household glass cleaners aren't designed for a car's delicate plastic and rubber parts. They'll slowly break down, causing leaks or pump failure. Real washer fluid also has antifreeze to prevent your entire system from freezing and cracking in the winter, which plain water and Windex will absolutely do.

[VonOwen]

As a quick fix in an absolute emergency, like if your reservoir is empty and your visibility is zero, you could use a small amount of water to get to a store. But never use Windex. The risk to your car's washer system isn't worth it. The proper fluid is formulated to clean without causing damage and to stay liquid in freezing temperatures, which is a critical safety feature.

[OPaul]

Skip the Windex. Think about it: automotive systems are designed for specific chemicals. Using a household cleaner is a gamble. The ammonia can wreck the seals in the pump, and without antifreeze, you're asking for a cracked reservoir come winter. A gallon of proper washer fluid costs a few dollars and protects your investment. It's one of the easiest and cheapest forms of preventative maintenance you can do for your car.