Okay so I have looked at like 40 pictures of belly rot...and none look quite right, but most of them are severe cases, and I am worried about my Louis. He is on that red reptile bark. UTH and overhead light. Temps seem fine. If anything I struggle with it being too dry not too wet. Cleaned regularly...no extra moisture. I am just wondering if it's brown dirt in the crevices as he crawls around, or the beginnings of scale rot. If it is rot, what do I need to do next?

I could not get a picture...so I took a scan. Gives a great look at it I hope.