My snake shed a couple of weeks ago, and it was a perfect shed except for a patch on her chin. I didn't think much of it at first but I think it may be keeping her from eating. When I gave her a rat she sniffed at it and then started rubbing her chin against her branch. We have soaked her a couple of times since her shed but it hasn't come off. I also tried rubbing it with a wet q-tip but she wasn't having that. What's the best way to remove a shed from an area she doesn't like touched?