Just give him a humid hide like I suggested above, and wait. The soak/towel method is used to remove stuck shed at the end of the shed cycle.
In addition to watching for clean eyes, make sure the tail tip sheds cleanly every time too. Stuck shed here will dry out, constrict the tail tip, cut off blood supply, and cause the tail tip to die. In a really bad case it can cause infection/sepsis and eventually kill the snake.