My Pied Male was shedding every 2 weeks for a good few months. I emailed every breeder I know and brought him to the vet to no avail. He had no other issues. Long story short he was more sensitive to humidity than the other snakes in the same rack. I drilled a few more holes in his tub and his shedding went back to normal. Not saying this is the answer, but if all else fails.