Okay so my friend is taking care of an african fat tailed gecko for his friend for 5 weeks. I'm worried that the friend that gave it to him is not giving proper care. The substrate is sand and the gecko has shedding problems (should it be something else and should he mist it? cuz you cant really mist sand) also all he uses is a heat pad and its like 75F i was thinking is should be like 85F right? with a heat lamp that gives off UV? does it need UV?