So this happened overnight in one camera. I've dealt with this issue before and it NEVER corrects- the camera will remain plagued for life, ime. As this was bought from Andy I did as he suggested and took it down, opened it, blow dryer, fog cleared. I was hopeful. No sooner than I got back down from reinstalling and the thing just fogged over again. Anyone have a trick to cure this? Like I said, once they get this and most especially once you open them, it never stops doing it. I reached out to Andy for a replacement but was just wondering if there's something else I might try.