That leaves me with this light with quite a bit of condensation in it. Still works. I'd like to try to crack it open, dry it out, and see if I can get a good seal. Tried continuing to zoom it both directions with significant torque, no dice. Maybe it splits on the light head somewhere? Screw inside the switch? Hoping someone might have an idea or two to try. At some point I'll just go gonzo and then we'll know post-mortem, but if I can get it resurrected would make a nice backup light for someone.No wrong answers, well, no wrong guesses. This Orca ZD710 was replaced under warranty, condensation in the light head. While I'm dissapointed it happened, the warranty replacement was extremely easy and convenient.