I would strip your enclosure down to the basics: two hides, a water bowl and paper towel for substrate. While he recovers, a sanitary set up is the best thing. Your humidity level will no doubt drop, but, if you cover the screen top and add a humid hide, he should be fine. Fortunately, it shouldn't cost much. After he recovers, you can build it back up slowly. I'd go naturalistic this time rather than bioactive, as Malum suggests.