Hi,
I would have a quick read through the caresheet to get an idea of what we normally recommend.
What are you using to measure your humidity? We normally recommend the acurite digital weatherstation with probe from wallmart for about $12.
It is traditionally a right pain in the situpons to get the temps and humidity right in larger enclosures - and trying to do it in an enclosure also housing a green iguana and box turtles would probably drive me insane.
I would try and keep his enclosure simple and easy to keep spotless until he has recovered - I would recommend newspaper or paper towels as a substrate as they are easiest to see when it needs cleaned and by their very nature demand a total cleanout every time.
They are cheap enough that this is not a problem however.
Make sure anything you apply topically does not contain painkillers as they are known to be toxic to BP's.
Keep to the clean setup untill he has shed at least once and the open wounds are gone - it generally takes a few sheds as the sheddig process itself can sometimes re-open scabbed over wounds.
Look for the post on treating the screen top to see if that is something you can do and think about making a humid hide if there seems to be no other way to get the required levels of both temp and humidity.
I'm sure I have forgotten something but others will chime in to help.
In the meantime I will copy this into a thread of its own to better help you get the replies needed.
dr del