It's not that serious of a problem.
If it were stuck on the booklungs, or something then maybe (and even then, I wouldn't count the spider out!), but this is clearly just a case of some of the molt being stuck on the top of the abdomen.
You do not really need to increase humidity to facilitate molting; it's internal hydration that matters (which is mentioned in the TKG as well).
And you should definitely dry things out if it's as moist as a pacman's substrate!
You can simply add more ventilation, or do a rehouse with some drier stuff if you aren't feeling too lazy![]()