Mid 70's should be fine. I have mine in a room with the AC vent closed and window open at night.
I assume you are talking about the eyecap? I would not worry about it. Is he in a tub? Think you said he is small. Gotta keep small ones well hydrated and he should shed the eyecap next shed.
I keep small ones (under a yr.) in a tub about 1/2 full of moist sphagnum moss. Makes them feel secure and hydrates them. I frequently just spray the moss when it gets dry.