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Tired of Headlamp moisture: Here’s the Solution

Tired of Headlamp moisture: Here’s the Solution

Snapshot: Monsoon not only comes with a pleasant weather, but some also with some dreadful problems for a vehicle such as headlight moisture. Here is how you will get rid of it.

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Shower season does bring pleasant weather to your locale and pouring rain also helps get rid of the dusty surrounds. But this pleasant nature might make you feel like a peasant, as it also offers a humid environment too, and high humidity means condensation. And what if this condensation gets inside the headlamp housing? Though, occasional condensation is fine, but if it never seems to dry, then that’s surely a problem.

After getting back from a night drive, headlamps starts cool down, this is when it can draw moisture from the air through vent holes, causing condensation that usually doesn’t last long. This explains explain the encounter of condensation in the morning after your car has been parked overnight.

There are many reasons that accounts for a water getting inside the vehicle such as debris blocking the vent hole, seam leakage or a crack can make a puddle in the housing. There is no rocket science here, simply a temperature change (due to climatic condition) inside the housing and the outer world, results in fogginess or moisture. You must have noticed at times that the windshield gets fogged when you switch on the air conditioner during humid or in winters when you drive with windows closed and heater on.

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And if there is a crack in the glass or lens where rain water can enter, then you will usually see larger droplets and puddles in the bottom due to leakage. In such a case, remove the headlight housing and make sure of the vent holes are clean. In old cars, there were no vent hole, so you can drill a couple of small holes across the bottom of your headlight housing. If there outlet, the evaporated moisture has no place to go, and will remain inside. Most common cause is dry out seam where the lens gets in contact with the housing. Due to extreme heat generated by the halogen or Xenon bulbs, the adhesive dries out that causes a small crack like opening that can allow water to access it.

Check for the cracks before you go any further, there could be rock chips on the headlamp.
How to get rid of moisture

Before removing the headlamp unit completely from the car, it is suggested to Consult the owner’s manual if you aren’t sure how to disassemble the headlight. Avoid breaking the seal or the clear plastic between the light and lens around light unless you are prepared to reseal it. Open the bonnet and remove the connections at the back of the light before unscrewing the unit.

If the moisture is minor, you can reach inside the headlight wipe the inside, using a lint free cloth or you can also use desiccant packets (Silica Gel sachet), as the are good to wick moisture. Place a silica gel pack inside the lens and these packs are easily available in market or the ones that often comes included in new product packaging. Desiccant packets can absorb up to 40 percent of their weight in water, but keep in mind to avoid the packets to get in contact with the lens. Compressed air can also help you in this case.

Another way is that during warm weather, you can sit your headlight in the sun and let it dry out, which is a slow process. If you think the moisture is higher by a fair amount, hair-dryer or a heat gun would be of good help to clear it and evaporate the moisture faster. When using a dryer or a heat gun, try and use it at a low level heat (less than 180 degrees Fahrenheit), you definitely don’t want to melt down other soft parts of the unit just to get the moisture out. Do not expose the headlamp to direct heat.

How to Prevent

Check the headlight unit to see where the water dripping in from and areas from where air can’t escape. If you are unable to find any rock chips or cracks, there could be a problem with the housing or housing vents. It is easier to prevent buildup once you get the source of the issue.

Check for any improperly fitting seals and replace them immediately. Make sure that the vents have proper escape root for air and not clogged, causing water buildup. Once the headlamp is dry, cover up the cracks or the outside with a sealant. If you still have trouble getting to the root of the issue or the moisture keeps returning, it is time to make a call for a professional. If you have a broken glass or lens in the headlight unit, you should get it replaced.

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