I was in a similar situation. In fact the beginning sounded like you were me :p nasty tank. Dried poo. Stuck shed on the snake. Stuck shed on everything else. The snake hadn't been touched in a month or two. Multiple burns on the snake from a uth INSIDE the tank. I came straight home took everything out bleach treated it. He also had a very serious RI and just finishe antibiotic injections about a week ago. And now look at how big and healthy my boy is!

Things do sound like they're turning a corner. Which is good. I also had the advantage of having a vet that had much experience in reptiles. Only one thing I didn't do which was apply neosporin to the burns. I used a solution of betadine twice a day until it started healing significantly (as I was directed from a user on here). But it sounds like your doing in the same situation with less resources. I'd say it says something about your care for the animals!