Hard to say from so little info. Fill this form so we get a better picture of your situation. https://www.chameleonforums.com/threads/how-to-ask-for-help.66/
I would mist for at least three minutes at a time. Or even five. Also let the cage dry between mistings! Additionally I gently spray my cham directly. That helps him clean his eyes.
Add more horizontal branches and d3 should not be given every day. Also only handle him on his own terms. The humidity seems fine. How long are the mistings?
Yea go to a vet that specializes in exotic animals right now. Looks very serious. After that fill out this form so we can figure out if your husbandry is ok.
https://www.chameleonforums.com/threads/how-to-ask-for-help.66/
If you buy her you are just telling companies like petco that they can get away with abusing their animals because someone will always buy them. I know it's heartbreaking to leave her there but in situations like this I would think about the bigger picture. We need petco to realize that they...