Is it moss or mold? Either way it most likely indicates your cage is never dry long enough to dry out. Mold can easily kill and cham. Any chance you can post pictures? It it were my cham, the branches would come out of the cage and be cleaned and sanitized again. jmo
No problems now, just removed the branches with the moss/mold substance. When I examined it more closely, it looked like a tree fungus that grows in my woods back home. Thanks All