Tips for Cleaning the Inside of Headlights

Types Of Headlights

The first thing you want to do before cleaning the inside of your headlights is to determine the type of headlights you have. Different types of headlights have different treatments. Fortunately, headlight types aren't too complicated, with two types: sealed and unsealed (or composite).

Sealed headlights are a single integrated unit where the bulb, reflector, and lens are all sealed together. They are usually more resistant to environmental factors such as moisture, dust, and dirt because they are completely sealed.

Non-sealed or composite headlamps consist of a removable lens, reflector housing, and a replaceable bulb that is usually accessible inside the housing.

We use different cleaning methods for different types of headlights.

How To Clean The Inside Of Headlights

Before we start cleaning, let's take a look at what essential tools we'll have on hand and what preparations we'll have to make.

Essential Tools And Materials For Cleaning Headlights

Preparation: Remove The Headlight Assembly

Composite Headlight

We'll start by cleaning non-sealed headlights, which are much more common and very easy to clean.

The cleaning process begins by removing any loose dirt or debris from the headlight housing. Use a soft bristle brush or vacuum to make sure the interior is free of any loose particles.

• Step 1: We use a soft bristle brush or a vacuum cleaner to remove the dust and debris from the headlight housing, making sure that the interior of the headlight is free of such small particles.
• Step 2: Pry the headlight lens out of the assembly.
• Step 3: Pour a bucket of warm water and add a small amount of mild detergent (dishwashing liquid, isopropyl alcohol, soap, etc.).
• Step 4: Soak a microfiber cloth in the water. Gently wipe the inside of the headlight housing with the fiber cloth to remove any stubborn dirt or grime. After wiping for a while, wash the cloth promptly to avoid spreading the dirt. Be careful not to scratch the surface. For hard-to-reach areas, you can wrap the cloth around a thin object (such as a stick or spoon handle) and use it to clean those areas. Avoid getting moisture into any electrical components.
• Step 5: Rinse the inside of the lens with water to remove any soap residue. Use a dry microfiber cloth to wipe away any excess water. Alternatively, you can use a hair dryer to dry out the moisture and make sure the lens is completely dry before reassembly, otherwise, condensation may occur.
• Step 6: Once it is completely dry, carefully place the headlight assembly back into position on the vehicle. If you disconnect the wiring harness, reconnect it. Secure the assembly with screws or clips.
• Step 7: Turn on the headlights to make sure they are working properly and no moisture is getting into the assembly.

Clean Inside Headlights Without Removing it

This method was shared by other people on the internet, we're not sure if it really works but we've organized it anyway, if anyone tries it and it works feel free to leave a comment. The principle of this cleaning method is to put one magnet into the headlight and then use another magnet to attract it from outside. We move the magnet on the outside and then drive the inner magnet on the inner surface.

• Step 1: You need to prepare two magnets with strong magnetic force but not too big. Neodymium magnets are recommended here.
• Step 2: Cut out enough microfiber cloth to wrap the magnets completely. Then, what we need to do is to wrap the two magnets in it separately. Make sure the magnets are put in and the microfiber doesn't separate, you'd better sew them up with thread. Any glue is not recommended here to avoid damaging our headlights.
• Step 3: Spray the microfiber cloth wrapped around the magnet with cleaner.
• Step 4: Place the magnet inside the headlight.
• Step 5: Move the outer magnet until the inner wrapped microfiber cloth removes all the dirt and debris. This can be time-consuming, so for best results, stay patient and careful.

Sealed Headlight

resort to its bulb port. The above-mentioned method of using a magnet is also perfect for closed headlights. If you don't have a magnet, you can follow the steps below to clean it:

• Step 1: Mix a mild soap or detergent solution with water. You can also add isopropyl alcohol for better cleaning and faster drying.
• Step 2: Pour the cleaning solution into the headlight using a small funnel and carefully pour the cleaning solution through one of the bulb openings into the headlight. (Make sure you have removed the bulb to avoid damage). Gently shake the solution to clean the inner surface.
• Step 3: Shake until you feel the headlight is clean, pour out the soapy water, and rinse the inside of the headlight with water. Remove any soap residue. Repeat the rinse several times until the water is clear.
• Step 4: Drain as much water out of the headlight as possible. Use a low-speed hair dryer or heat gun to gently heat the headlight assembly and evaporate any remaining water inside. Keep at a safe distance to avoid overheating the plastic. Make sure the headlight is completely dry before reassembly.
• Step 5: Once the headlight is completely dry, reinstall the bulb. Reconnect all wiring harnesses and reinstall to vehicle.

Other Useful Tips For Cleaning Headlights

Toothpaste Method

Apply a small amount of toothpaste to the headlight lens. Use a soft cloth to rub the toothpaste over the lens in a circular motion. Toothpaste contains mild abrasives that will wipe away the fuzzy layer on your headlights and restore clarity.

Baking soda and vinegar solution

Mix baking soda and vinegar into a paste. Apply the paste to the headlight lens with a soft cloth or brush. Baking soda is slightly abrasive and helps clean, while vinegar is acidic and removes dirt and oxides.

Headlight Restoration Kit

Follow the instructions provided in the kit. Typically, these kits include sandpaper, polish and UV sealer. Sand the headlights in multiple stages, starting with coarser sandpaper and then transitioning to finer sandpaper. Apply polish and buff the lens until it is clear. Finally, a UV sealer is applied to protect the headlight from future oxidation.

UV Sealer

After cleaning and restoring the headlight, apply a UV protective film or coating to the lens. This protects against future UV damage and keeps the headlights clearer for longer.

Sandpaper Method

Wet the headlight lens and sandpaper. Begin sanding with 1000 grit sandpaper, keeping the lens wet. Sand in a horizontal motion. Move to 2000 grit sandpaper and sand in a vertical motion. Finish with 3000 grit sandpaper and sand in a circular motion. Rinse the lens and apply polish to polish the headlight to a clear surface. Wet sanding removes oxidized layers and, in combination with polishing, achieves a smooth, clear surface.

How to Maintain Clean Headlights?

Cleaning the inside of your car headlights is not complicated though. If you take care of your headlights, it helps you to extend the time and reduce the number of times you have to clean your headlights next time. Our experts give the following methods:

1. Use mild car soap and water to clean your headlights regularly. Gently scrub the headlights with a soft cloth or sponge to remove dust and dirt.

2. Reduce UV exposure by applying a UV sealant, parking your vehicle in the shade, or using a car cover. This will protect your headlights from sun damage and keep them clearer for longer.

3. Apply a coat of wax to your headlights after every car wash. The wax will act as a protective barrier against dirt, debris, and UV rays.

4. Use a commercial headlight cleaner or polish designed for plastic headlights. These products help remove oxides and restore clarity.

5. Check your headlights regularly for signs of oxidation, yellowing or damage. Early detection makes maintenance easier and prevents the need for more extensive repairs.

By following these steps, you can keep your headlights clean and clear, ensuring better visibility and enhancing the overall appearance of your vehicle.

Conclusion

I'm sure you've learned how to clean the inside of your headlights after reading this article. Clear and bright headlights make you safer driving at night and ensure your visibility on the road at night. Keep yourself and others on the road safe. Follow our guide to quickly clean your headlights. If you have tried to clean your headlights by following the methods we have provided and it didn't work, then it's time to replace your headlight assembly. MOTPLUS offers high quality and good prices, come to our online store to order!

FAQs

How often should you clean your headlights?

It would be best if you cleaned your headlights at least once a month to remove dirt, grime, and other residues that can impair visibility.

How do I protect my headlights after cleaning?

After cleaning your headlights, protect them by applying a UV-protectant sealant to prevent oxidation and yellowing. Additionally, consider using wax or polish to add a protective layer against dirt and grime.

Can you use Rainx on plastic headlights?

Yes, you can use Rain-X on plastic headlights. Rain-X products that are designed for automotive glass, like their water repellent, can also be applied to plastic surfaces such as headlights. This can help repel water and improve visibility during rain.