Alcohol wipe down after screwing in.
I've seen many warnings on RIU re:wiping oily prints off HPS bulbs, but zero from any manufacturers (haven't really looked that much)
Seems sellers would benefit from this being mentioned on the packaging if it were a huge thing, but it only takes a sec, so yetta hey.
Then again, perhaps it's a sales tactic used to get me back "in the store" as I inquire about my piece-of-shit 600W "default" 8-year bulb that blew in 65 hours? Just gotta let 'em know that when I say 'No, thanks" I mean "LEAVE ME THE F ALONE AND GET THOSE BULBS IN THE MAIL YESTERDAY!!!!
Why any company would stock bulbs they know are prone to constantly blow is beyond me?