We did it! What I ended up doing was soaking her for 20 minutes, then running her through a damp washcloth. This managed to get the shed on the base of her neck off, but not her head. Through all this though, I could see that I managed to break off a little flap at the base of her nose, and really moisten up the skin on her head. All of this took a LOT of patience as messing with her head very much offended Willow. So what I ended up doing was taking tweezers and VERY gently pulling up the flap a tiny bit, then I used my thumb to rub it back over and over until the shed left on her head came off. I had thought that she only had one eye cap to lose, but both came off!!
I am so immensely relieved that this is over with. Since the start of this I have gotten a MUCH better hold on the humidity and temperatures in her tub, and I will modify the humidity box I made to have moss instead of paper towels. Hopefully this will prevent this happening again in the future!
I would like to thank you all for the help and tips! I'm not sure how I would have handled this without this forum.
Willow, beautiful and bright eyed now that that yucky skin is off!
(I am giving her a few days off from any handling, because I feel this past week of working off shed was very stressful for her.)