If your snake has been soaking already for a day or two then old skin should be loose and looking somewhat like a glove if it is ready to come off. I would that it out of the bowl so it will move across the substrate and pull off. If it doesn't come off in 24 hours I's use a wet paper towel or completely clean (with no fabric softener) hand towel to let her crawl though in your hands.
I would also consider your humidity level. It seems you posted not so long ago about her soaking for days. I don't know about anyone else's less than yearlings, but to this day mine shed in one piece every time and I have NEVER seen any of the 3 babies soak in their water. I sometimes wonder why I bother to even keep a water bowl in their enclosures since I have not any of the 3 ever even take one drink. My humidity is constantly high in these cages-there is ALWAYS condensation on at least 75% of the sides.
Anyway just some thoughts.
Linda