A larger water bowl does help to raise the humidity...how are you measuring the humidity? Some gauges aren't very accurate.
She may have used the larger water bowl for a soak when you were asleep...maybe it's time for a bigger tank...?
When did she eat last, in relation to this shed? I've found that when some snakes are fed during their shed cycle (once they start clouding up) that it may
impact their shed, making it stick & come off in pieces like this. That's because shedding requires good hydration and so does digestion...some snakes
appear to have trouble doing both at the same time ("multi-tasking"), so even if a snake will accept food sometimes it's better to wait, & let them do
one thing at a time.