ball pythons should be shedding every 4-6 weeks. up the hot side to 90 degrees Fahrenheit and the cold side to 80. and make sure you have a plastic container with a cap with a hole drilled into it with moss inside that everyday is sprayed with water so that it's a bit more humid. make sure the hole is big enough for the snake to crawl inside. I really hope you can solve this problem! make sure you haver rocks in there and décor for him to peel off shed with. do a deep cleaning and search for baled up shed. if none of this works take him to a vet. something could be seriously wrong. I really hope you can solve this and wish you the best of luck!