Don't try to force it, he will shed when good and ready in his own time. The only thing you should do is place a moist tub in the viv. If he feels that he needs it then he will use it.
0.0.1 MBK : Fester 0.0.1 Florida King : Rattler (Rattle & Hum) 0.0.1 Californian King : Diablo Diego 1.0.0 Coastal Carpet Python : Vambo 0.0.1 Grey Rat Snake : Mirkey 0.0.3 Corn Snakes : Taggart, Woody & Blaze 0.2.0 Tarantulas : New River Red Rump. Red Chile Rose