What @casportpony said since the little one isn’t getting anything from the yolk since it’s not absorbing it she will get hydrated. They live off the yolk after hatch. Just know we’re all here rooting for the little one an you!
@Opal8 if you decide to follow your vets advise and that is most defiently up to you I’d try a tiny bit of sugar water just along her bill and she if she responds. Not sure she will eat.
I don't see how she can keep this moist seems putting anything on that risks adding bacteria. That's why @WVduckchick said not to use a wet paper towel. Plus causing chilling, I'd def pout her in a deeper bowl so she doesn't get out and possibly rupture the sac.