my cham only get out on his term.
At least once a week, he will have the urge to get out of his cage and that's when he's easy to be taken out. During that moment, I put him outside and start cleaning his cage.
I tried all the method available, but once he hold his ground and refuse to get out, no matter what, he will stay inside the cage.
He signals me when he's ready to get out by hanging out at the cage door.
By then I just open the door and put a plant in front of his cage.
Within a minute or two, he usually jet to the plant. and voila, i took the plant and put him in his sunning cage.