Why the moisture collect inside your headlights?

Initially, when the outside air is cooler than the air inside the lighting assembly, moisture droplets may form on the inside of the lens. This is a normal phenomenon. Condensation naturally occurs when water vapor turns into liquid.

WHow can you get rid of it?

Let the Moisture Evaporate Naturally
Sometimes, moisture will disappear on its own when the headlights are turned on, as the heat helps evaporate the condensation. Parking your car in direct sunlight can also speed up this process.

Use a Hair Dryer
You can carefully remove the headlight assembly and disassemble it without damaging the seal. Then, dry each part individually using a hair dryer. To avoid damaging electrical wiring or warping rubber components, keep the temperature around 180 degrees Fahrenheit.

Use Dry Silica Gel Desiccant Packets
Remove the cap on the back of your headlights and place 2-3 silica gel packets inside. You can easily find these desiccant packets on Amazon. Just be careful when inserting the packets to avoid damaging any components.

Finally, to completely remove water from your headlights, you’ll need to take off the seal. Before proceeding, consult your service manual to learn how to safely remove the seal on your specific model. This process is more complex and typically requires a heat gun—unless your headlight assembly has a replaceable seal. If you’re not experienced with using a heat gun in this context, it’s best to leave the job to a professional to avoid damaging your headlights.

Prevent Further Moisture

The key to preventing future moisture buildup is ensuring a tight, secure seal. Several products can help you restore or reinforce this seal. Start by inspecting the existing seal for any damage or debris. If needed, apply a bead of silicone sealant around the factory seal area to block out moisture, or replace the seal entirely if your headlight housing uses a replaceable one. Additionally, be sure to check the O-rings protecting the electrical connectors, bulbs, vents, and other components within the headlight assembly.

Should You Replace Your Headlights?

If moisture continues to return—such as when your headlight looks like a small aquarium—you may need to replace the entire headlight assembly. However, if the condensation is light to moderate and the light still shines clearly through it, this is likely just a normal, natural occurrence.