Wow man I don't want to attack you but you need to get it together. I'm glad you're on top of this and being honest, and you've caught it early so there is likely no need for a vet trip yet but, if her husbandry "isn't too great" to the point of causing scale rot, you need to fix it NOW. The betadine will help but it will not fix the problem if the husbandry issues are still present.

A bin setup with newspaper or papertowel would be ideal for the moment, you can keep the humidity high enough for her to get the shed off, but the substrate (paper) can be dry so that her scale rot doesn't get worse.