My Facility is lit mainly with these lampsM400W/BU/UVP/4K. 9 times out of ten when I go to replace the lamps, it takes quite a bit of persuasion to get them out of the socket. So my first question, is there some sort of solvent I could spray up into the socket to loosen things up? Before anyone answers DW40, I do know it's an option, but every time I've used it on something (bikes, tools, cars) someone wiser than I has ground it into my head that rubbing sand on the object in question would have worked better in the long run. Second question: I know in part that the sticky lamps are do to arcing in the socket, to the extent that a few of the lamp bases have mostly melted away. At first I assumed that this was par for the course when it came to HIDs, now I'm beginning to have my doubts. I figured that the lamps were going to arc anyway, so it wasn't worth it to install new porcelain bases, am I wrong? Lastly: Lamp lube, is it worth it? If so, what would you recommend? I've read suggestions saying everything from commercially available lubes, to plain old Vaseline. In a perfect world I would imagine the stuff to be non conductive, make it easier to screw the lamp in, hopefully (but probably not) reduce the risk of arcing, and in the end make it easier to get the lamps out again (if the stuff sticks around that long). What should I really expect? P.S. I do plan on CONSULTING A QUALIFIED ELECTRICIAN but wanted your opinions as well.