Are your headlights always collecting waterand moisture? A certain amount of moisture is actually normal for your carheadlights. It happens when the outside temperature is cooler than thetemperature inside which is pretty often because the lamps makes it warm. Thesesmall amounts of moisture will evaporate the next morning when the sunequalizes the inside and outside temperature. But when you have water poolinginside your headlights, then you'll need to remove the housing and dry it out.
Headlights are supposed to allow thesedroplets to evaporate properly, but if it doesn't; then you can have water inyour headlights that's annoying and could possibly cause damage to your car. Ifyou have more than a spoonful of water in there, you will need to remove thehousing and allow it to dry out. If the build-up of moisture happens all thetime, you may have to have the sealing and venting of your headlights checkedby an auto repair specialist.
For drying out your headlights, remove thehousing and pour out the excess water. Allow it to dry out then pour in a fewounces of rubbing alcohol, let it slosh around, and then pour it out. You canrepeat this process one more time then leave the housing out to dry in an areawhere there's some air movement. While you have the housing out, you can alsocheck the vents for any debris or dirt. Once it's dry, reinstall the housingand you'll have dry, moisture free headlights on your car.
For car or engine troubleshooting, visityour local auto car repair shop Rock Hill SC
Resource: How to Dry Out Your Foggy Headlights