Good evening

Having dealt with scale rot first hand on too many corn snakes and ball pythons, Unfortunately, from what I have read and seen, you have scale rot but it is not past the point where it is too late.

Betadine is a great option. However, let us skip the technical stuff. Iodine. straight on paper tower, wipe her down in the morning and the evening. Keep her on paper towel, keep the heat up, offer food if she will eat, but do not force it. Offer a fresh water supply daily. Allow her to soak if necessary. Also, I used polysporin (Herptologist even told me to use it) to cover the infected area to help keep it clean. You also need to change the paper towel daily. No UTH, just a heat lamp, daylight and offer a UVB light source (Exoterra 2.0 or less) to help her out.

I speak from experience, and having lost 1 to scale rot, I do not wish it on anyone.

Hope this helps.