About 2 weeks in to having my Artebs installed and I got moisture in the driver's side headlight after going through the car wash.
Up close you can see the water droplets sitting on the inside of the lens.
(Edit: The cause of this problem is presented in post #127 below.)
Barring leakage where the lens is sealed to the housing, IIRC the only water ingress points would be:
- leaking around the HB3/HB4 bulbs where their integral O-ring seals to the housing
- around the "city light" fixture; that fixture should have a O-ring on it that seals the gap between it and the housing
- into and through one of the three vent tubes (they should all be facing down)
Check the bulbs' fitment in the housing; make sure their O-rings are properly sized to seal well. They should not wiggle much, if at all, when inserted and twist-locked into place. Odd-duck bulbs (think LEDs from China sold on eBay) might not have the proper fitment to seal properly.
Check the city light fixture, make sure its O-ring is present.
Confirm the three vent tubes face downward.
Confirm that the lens is intact, e.g., it hasn't taken a rock-hit.
I would dry that housing ASAP, that's just me. I suspect the reflective coating may degrade if exposed to water for an extended length of time and that would be a Bad Thing™. I've got some cheapie turn signal housings on my Suburban that take water at the car wash, and their cheapie reflective coating is pock-marked with dark spots.
I once had some TYC headlights that leaked, and when they took water I would
remove the housing from the truck, pull the bulbs and let them sit in front of a hair dryer or warm air register.
Eventually I held the TYCs lens-down in a pail of shallow water, which exposed a leak at the lens / housing seal. I certainly hope you're not witnessing a leak
there.
The TYCs I had were
junk. The mounting cam for the bulbs would not hold them tightly in the housing. The O-ring on the bulbs would not seal well against the too-big hole in the housing. The housing had no vents (that I could find), so as they warmed / cooled they had to breathe through whatever leakage path they could find (around the bulbs' O-rings?) or create (push out the lens / housing seal?). Their illumination pattern was extremely poor. They were what motivated me to
find a way to get the Artebs for myself.