Stuck belly shed. Rot? help!

[Zincubus]

So! I have a ball python who i recently got a new huge cage for. Her first shed in it she had a hard time so i put her in warm water, it came off.. so i thought.
A couple weeks later, "i have been very busy" I found out she had stuck shed on her whole belly. Long story short its stuck on her and just today i noticed its yellow near her tail.. belly rot? i have no idea any help on how to take care of this will be most helpful. here is some pics.. if i can find out how to add them haha

Best method I've come across works 99% of the time is ...

Soak the snake in a secure rub / container for about 30 minutes and then get a wet , rough textured towel and feed the snake through the towel repeatedly .. all shed / dead skin will magically come off ..