i usally keep my water dish on the cool side. i haved the humidity guage in the middle of the tank so i guess the humity is about the same all around. he hasnt had a bad shed yet. all were in one peice. as for the logs i clean them often and check them for any mold or anything like that about every 2 days or so. i dont think the logs bother him at all. im preety sure he feel secure in there i think he likes them in a way he uses both exits. when i first got them there was only one exit ( one side was against the glass). he would move them around and thats where they ended up.