When I first got my pacman it was too cold for him but the humidity was 70-80. I purchased a lamp for him and now his tank is about 80 degrees, but the humidity won't go past 60 with the lamp on. I mist his tank and him every hour. Also, he's juvenile ornate, and used to have green stripes on his face, but now they've turned brownish, though the green on his back is still bright. What's going on with his skin, and how do I get the humidity up?