I'd soak him Sam. He's had long enough to get that old skin off so will likely feel much better if you intervene at this point (well he won't like being soaked but you get the idea). Take a margine tub or something like that and put just enough tepid water in it for Ash to soak in but not over his back so that he'd be forced to swim. Pop him in (this is the part he will NOT like), snap the lid on. Put him and his soaking tub back in his regular enclosure and leave him be in there for a good hour (make sure the enclosure is secure...they have been known to get out of margarine tubs LOL). Remove a rather ticked off Ash and let him slither through a wet, rough facecloth. Just use a bit of tension in your hands to provide pressure against his movement through the cloth. The stuck shed should come right off.

Make sure you check afterwards that it's all off especially the tail tip.

Ash probably won't like this but it's for the best. Next time watch for the first signs of the shed cycle which are usually a pinkish belly, then the colors dulling and the eyes going blue. If you push his humidity up to the 60-70% range for the whole shed cycle it'll likely go better the next time.

It's also not unusual for the first shed or two to be funky until the snake adjusts and you adjust to his shed cycles.

Let us know how it went and hey we want freshly shed pics! LOL