Guys foggers are not really natural humidity and can most definitely cause RI and other problems with extended use and no cleaning. Heat and humidity are even worse for sure. That said, they are a great tool for the people that truly need them and are willing to clean them regularly. I've seen foggers cover with mold after a few uses with distilled water. If I can get by without one I'll do that. The chances of harming the animal with a fogger are much higher than just extended misting. Our chameleons aren't living in the mountains of Kenya(which does have natural humidity)...
I saw petr necas report back when it first came out. I get it, everyone's jumping on that. And I've seen his Facebook posts, he's clearly an expert that knows far more than most, but I don't know how we can translate that to captivity since foggers aren't the most sanitary devices. A nice heavy misting when lights go out might be enough to keep the humidity at a good level at night.