Leave him on his plant..............take him in the shower and turn the water on luke warm. Do not place him in direct water ...just put him in there and let the humidity absorb into his skin. Leave him in there a good 20-30 minutes.
We live in Arizona and we bought a beautiful pink hibiscus. Our cham loved eating the flowers as well but it didn't seem to last long in the cage. We thought there was no hope left for it but stuck it outside and put a sprinkler hose directly into it. Shockingly, it's gorgeous with huge pink...
We just shipped our veiled cham out. Use a small box ..one that doesn't leave any more than a few inches around him in all directions. Put him in a cloth bag that has holes in it for him to breathe. Bubble wrap is good to put around the inside of the box incase he gets bumped around he wont...