Originally Posted by maxcichon
Now that you've said that, you MUST tell all! It's only fair, and that's why we are all here!

Good point! I took the easy way out as I am studying for an exam and was too lazy to type out an explanation. In retrospect however it probably would have taken the same amount of time as the post I wrote anyhow.
SKIP TO THE BOTTOM FOR DIRECTIONS
I installed HID's in November and had one bulb burn out (passenger side). Unless you remove the coolant tank (correct me if I am wrong) near the headlamp assembly (which I did not do during install/removal) there is little room to work with, as many of you probably know. During the reinstall of the replaced HID bulb the metal clip fell into the bowels of the engine.
Now for those of you who have done an HID install you know how frustrating it can be removing the metal clip that holds the bulb in, placing the bulb in, and then somehow miraculously replacing the metal clip while keeping the HID wires in the middle of the clip. For those of you who haven't done this it is a miserable process that will literally test your sanity. (Note: Remove that coolant tank before installing lights to free up room!)
So there I was with no clip to hold my headlamps in. I investigated under the bonnet and then under the car, removing the oil pan guard and shining a work lamp up into the underbelly of the engine bay. No sign of the metal clip. I needed a quick fix just to hold the bulb in place until I could find a solution. I wadded up paper towels (I know its awful) and pressed them against the back of the bulb to keep the bulbs base flush with headlamp assembly.
DO NOT DO THIS!
What I failed to realize was that this obviously leaves space between the bulb and headlamp assembly where moisture can get in. Freezing temps combined with warming periods in the weather caused a nasty condensation problem inside the headlamp. There was literally was water pooled in the bottom. It was awful and very unsightly.
I posted a thread about locating or buying a new headlamp clip on the forum but few people seem to have any ideas. One member I recall had manufactured his own clip from metal wire.
MY SOLUTION:
I went to Home Depot and purchased electrical putty (can be found in the electrical section). This is a waterproof, fireproof, tacky clay that never completely dries yet maintains a good hold on plastics, wood, and drywall. It cost me $3 or so. I also picked up a Silica Gel pack (the kind you find in shoe boxes).
Tools:
Silica Gel pack
Fishing line (dental floss works too)
Electrical putty
Directions:
1. Cut hole in silica gel pack (not too big so the little pieces of silica don't fall out)
2. Thread the fishing line through the hole and tie a strong knot!
3. Remove headlight bulb
4. Place silica gel pack through bulb socket hole in the headlamp assembly (remember to leave enough fishing line out the other end so you can remove it!)
5. Place bulb back in socket
6. Take electrical putty and carefully press it around the section where the base of the bulb meets the headlamp assembly (the head lamp clip will suffice also) Note: if using electrical putty make sure the entire rim of the bulb's base is fully covered and sealed with the putty
7. Wait and watch! After four days that dripping condensation which looked impossible to ever remove was gone! I watched it dry up with my own eyes!
8. Once all the condensation is gone remove the putty/clip , remove the bulb, and gingerly remove the silica pack by pulling on the fishing line (BE CAREFUL when you do this so the silica pack doesn't rip off and land inside the headlight assembly!)
9. Place the bulb back and the clip and you are good to go!
*This is a somewhat jerryrigged process and I can imagine people not being comfortable doing this. In my case my car only has the powertrain warranty left so it was either get creative or go to the stealership.
**I think that even if you have your headlight clip and you still are getting condensation in the interior of the headlamp assembly, trying a combo of this method and using your clip could be successful!
***If you use this method and the condensation still isn't going away then there is still an area somewhere where moisture is seeping in. Redo the electrical putty around the seal or adjust it and see if you notice any changes in the condensation.
****If the moisture isn't coming in from where the bulb meets the headlight assembly then you probably will have to take the car in to get this repaired.
*****The electrical putty is AWESOME! It never completely dries so you can always remove it at any time. So don't worry about having your car permanently effected.