It does look as if there was retained shed there, so in future make very sure all the shed comes off the tips of his fingers and toes, very important, you can loosen it in a
bath & use a soft toothbrush to help get it off. If left, it shrinks and can restrict the blood flow at the tip of the finger or toe. Also I think he's not high enough for his UVB, is there any way to drop the tube? Measure as he should be 6-8 inches away from his
UVB light. Otherwise you enclosure is really nice!