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How To Fill Windshield Wiper Fluid

Windshield wiper fluid is one of those products that we take for granted. We just pop a bottle of it in the cup holder and go about our day. But did you know that windshield wiper fluid is an important part of a car’s safety system? In this blog post, we will explore how to fill windshield wiper fluid and why it’s so important. From stopping rain from getting on your windshield to clearing snow, windshield wiper fluid plays an essential role in keeping you safe while driving.

What Windshield Wiper Fluid is and what it does

Windshield wipers work by spraying water droplets onto the windshield to clear it of rain or snow. Windshield wiper fluid is a type of motor oil that is used in lieu of water when operating the wipers.

Windshield wiper fluid helps prevent fogging and streaking on your windshield by lubricating the moving parts inside the wiper arm. It also keeps the blades clean and functioning properly.

How to fill windshield wiper fluid

If your windshield wiper fluid is low, it’s important to refill the reservoir as soon as possible. Here’s how:

1. Park your car in a safe place with the engine off.
2. Open the hood and locate the reservoir. It will usually be on the driver’s side or passenger side of the vehicle close to the engine.
3. Use a wrench to unscrew the cap on top of the reservoir.
4. Pour in enough windshield wiper fluid to cover the bristles on each wiper blade (you may need two or three flushes). Replace the cap and screw it into place.
5. Turn on your car and wait until each wiper has fully raised and then lowered several times before driving away.

When to replace windshield wiper fluid

When To Replace Windshield Wiper Fluid:

Replacing windshield wiper fluid is an annual maintenance task that should be performed in the spring and fall. The fluid helps to clean the windshield while providing a layer of protection against rain and snow. When the time comes to replace the fluid, use this guide to determine when it’s time:

– if your windshield wipers are making loud noise or struggle to move the water effectively, it’s time for a new bottle of fluid. Old fluid can cause these issues.

– if you see water building up on the inside of your windshield, it means that the seal between wiper blade and glass is deteriorating. This leads to water being forced onto the driver side mirror instead of onto the windshield. Replace your wiper blade along with your wiper fluid every 2 years, or when you notice significant damage or deterioration.


If you have a car with an automatic windshield wiper system, then the task of filling the reservoir is as easy as pressing a button. However, if your car has a manual wiper system, things get a bit more complicated. In this article, we will show you how to fill the reservoir on a manual wiper system.