Is she seriously "stuck" as in, she cannot get out even if she wants to ?
Or stuck, as in refusing to come out of her "nice and tight" hide ?
If she just doesn't want to budge, lay the entire thing in the cage and wait her out, get up in the middle of the night, and once she is out, remove the water fall thingie !
Best just to mist periodically
If she is seriously stuck, you'll have to take that thing apart VERY carefully and methodically. Take your time ...
Good luck either way !