How long did you soak the snake and tail?
Figment - my male corn, had a similar issue. I soaked him for a few hours and it came off, but so did the scales at the tip of his tail exposing the bone (1mm worth or so). I put neosporin (original without the pain killing agent that can be deadly to snakes) on it and it healed up quickly without getting infected.
After the long soak (which you might want to do on multiple occasions over several days) you can also try putting the CP in a small container full of moist and warm - not hot - paper towels and see if she can rub it off herself. If all that fails, I would go the route you were talking and/or a vet.
Below is the post on Figment's tail. I felt terrible, as I should have caught it earlier, but he seems no worse for the wear. I think the big issue is if the snake loses scales and/or has circulation issues, make sure it doesn't get infected for the former and probably need to see a vet for the latter.
https://ball-pythons.net/forums/show...rn-Baby/page11
I will add that he's had issues since then with his tail and I have to help with most sheds. Doesn't matter how high I make humidity etc. That's an ongoing problem for him. Shed comes off perfect everywhere else and then I help with that little bit. He's pretty cool about it which helps.
I know I am preaching to the choir here, but wanted to point out a) that I've been there and b) the longer you can soak the better.
Keep us posted.