His skin is wrinkly and weird looking because the humidity was too low and he couldnt shed. Take a tub that he can fit into and comfortably move around in. Put some warmish water in it. No deeper then half his body. Pop the snake in with some paper towel or a cloth or something in the container. Pop the container over the hot spot for about 45 minutes to an hour. After finished let the snake run through the cloth until the shed is gone.
Once finished pop him back in enclosure leave him for a bit and then try to feed.