In Reply to: Having a problem w/clears. posted by Alpina22 on July 05, 2000 at 08:54:24:
: Looking for answers....
It is not a humidity issue (unless you actually have water droplets inside the light)
The lamps on the E39 (and probably others) are affected by a process of "off gassing" of the plastic components.
Basically some of the plastic evaporates and then recondenses on the internal glass lenses, the rear of the plastic cover,and the rear reflectors.
It makes the howl light look cloudy. This will be even wors if you have a lot of scratches or dirt on the front of the plastic cover.
Only way to fix is to remove the headlights, open them up and clean all the internal components.
I know I posted the process on this board - must be in the archives someplace.
My car is now 3 1/2 years old and I had done this twice - hoping that i would not have to do it again. But sadly it was cloudy again this spring - so I did it just yesterday.
It is very difficult to clean the back of the plastic cover, and not leave fine scratches or lint. I may try again using that Windex Outdoor spray for windows. I will just pour it in the cover and let it slosh around - then rinse thoroughly with water. Not sure when I will try this so don't hold you breath waiting for a report.
I hope that "clears" up the issue for you.