At 20%, the humidity is a problem, which may contribute to her shedding issues. Paper towels, while a common substrate in tubs is a poor matrix for holding moisture.
You may try adding a larger water dish, that will help with the humidity and may help to facilitate her to defecate as well. Some damp sphagnum moss or a moist hand towel in the enclosure may also be a benefit to the humidity.
Going off feed is a normal yet frustrating habit of BP's. But from what you are describing, it dosnt seem like anything to be concerned about yet. Just keep a close eye on her weight and check for dehydration.
Good luck, please keep us informed.![]()