I would mist his cage down to bump up the humidty to 70% constant, but dont soak him, not yet.
If it really is coming off, where you can rub your finger down his spine lightly (but firmly) and you get some shed peeling off, then he may need some help. I will refer you to this thread "Bad Shed? No problem." Make sure, whatever you do, that you DO NOT LEAVE HIM UNATTENDED while soaking!
For now, leave him alone, make sure his husbandry is correct.