I have a Jackson’s so low temps and high humidity at night are crucial for him. I fog from the top down because if you try to fog from the bottom up it just doesn’t work, the humid air is too heavy to move up. I try to aim the pvc pipe I use so the fog cascades down over my guy so he’s engulfed in it. Then I’m sure he’s breathing it. I have always fogged as long as the air temp is 68 degrees or lower. Thats what many people I have talked to recommended. Of course I prefer it to be below 67 degrees if at all possible. I will open a window right next to his enclosure if I have to to bring the temp down. I hope this helps. for some reason I can’t add photos showing you how I set up my fogger to fog from the top down so I will try to explain. I use a petspioneer fogger and some pvc pipe and fittings to take the fog from the top of the fogger up to the top of the enclosure then add an elbow piece and aprox A foot long straight piece of pvc pipe and then another elbow. This takes it up and over the enclosure, partway across the top and then angle it down over the chameleon. I cant remember what size pipe I used, might be 1 3/4 ? It just has to fit over the nozzle on your fogger.