Well I have figured out my Cham does NOT like it when I wear a red shirt. He runs away and hides faster than when the mister hits him LOL. I know red is usually a sign of aggression so it kind of makes sense.
My one chameleon hated this pink towel I put in the bottom of the cage to soak up water. It took me a few days to figure it out, and then I felt horrible that I had stressed him like that! As soon, as I removed it, he was back to normal!