HEADLIGHTS

What's Up With the Water in My Headlights?

Ever walked up to your car and noticed what looks like water droplets inside your headlights? Your first thought might be, "How do I get rid of this fog in my headlights?" Well, you're in the right place. We'll help you find out why it happens and how to prevent it. 

Let's dive into the science of condensation and how it affects your headlights. After that, we'll share some handy tips on preventing and removing water build-up inside those headlights.

car-with-water-in-headlights

Waseem Khokar on Headlight Junkies

Why is There Moisture Inside My Headlights?

The answer is pretty straightforward - condensation. Condensation is when a vapor or gas turns into a liquid. As a result, water collects as droplets on a cool surface when humid air comes in contact with it. Droplets, mists, and fog can all result from condensation. This is a normal process, especially when the weather changes. 

The misting within the headlight will usually clear up on its own. However, if you notice an excess amount of condensation, there might be an underlying issue with the headlight itself. If you're dealing with a lot of water in your headlight, it could lead to other problems. Too much water might suggest that the headlight has damage, like a tiny crack in the lens or a failing seal. This water build-up could potentially damage the internals of your headlight, rendering the whole unit useless.

How Does Heat Generation Affect My Headlights?

Headlights naturally generate heat when in use. Bulbs create heat, and that heat gets transferred through the headlight housing. Because of this heat, headlights need a way to ventilate and regulate internal temperatures. 

Due to thermal convection, condensation will occur when warm air rises, cool air falls, and the two meet. If there's damage to the headlight that prevents this process from happening, you'll start to notice condensation that builds up. This will form larger water droplets.

condensation-in-headlights

Scott Hamlyn on Headlight Junkies

How Do I Get Rid of Foggy Headlights?

If you've got a case of the foggy headlights, don't sweat it. We've got some tried-and-true methods to help you clear things up:

  1. Heat It Up: One of the first things you might hear is to apply heat to the headlight. You can use a hairdryer or a heat gun to warm up the lenses, which can help the condensation in your headlights dry out.
  2. Sunshine Solution: If you don't have a heat gun or hairdryer handy, you can also use the sun. Just remove the headlight bulbs and the dust cap, then park your car in direct sunlight. The heat from the sun can have the same effect as the heat gun or hairdryer.
  3. Avoid Water: If you're in a place without a lot of sunlight or natural heat, your best bet is to keep your vehicle away from water. This includes when it rains or even when you're thinking about taking it through a car wash. Let the headlights dry out on their own time.

Remember, these methods are just ways to help remove water from inside your headlight. But the real question is, how do you prevent water from getting there in the first place? We'll dive into that next.

How Can I Prevent Water Build-Up in My Headlights?

So, you've managed to get rid of the water in your headlights. Great job! But wouldn't it be better if we could stop the water from getting there in the first place? Let's check out how we can do that.

  1. Check the Vents: The first thing you should do is check the vents on your headlight. Are they intact? Are they plugged or damaged in any way? If the vents are in good shape, you can move on to the next step.
  2. Inspect the Assembly for Cracks: Now, it's time to give your headlight assembly a thorough inspection. Look carefully at the back of the housing and on the lenses. Are there any cracks or damages? If you can't find any, then it's time to consider the next possibility.
  3. Consider the Seal: If there's no visible damage to the headlight, then the seal might be the culprit. But don't worry – fixing a broken headlight seal can be pretty straightforward. We've created a step-by-step tutorial on how to re-seal your headlight using the Morimoto Retrorubber.
  4. Look for Replacements: OEM headlight replacement housings are available from reputable companies like TYC or Eagle Eyes if you don't want to reseal your headlight.

By following these steps, you can prevent water from building up in your headlights in the first place. Remember, prevention is always better than cure!

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So, there you have it! Condensation in your headlights is usually a natural process, but if there's too much, it could indicate damage. 

You can clear up foggy headlights with heat, sunlight, or by avoiding water. To prevent water build-up, check the vents, inspect for cracks, consider the seal, and look for replacements if needed. 

Remember, prevention is key! If you need more help, reach out to us at Headlight Revolution. While you're at it, check out our YouTube channel for more tips and tricks!

 

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