>>Well he's about 6-7 inches, just over a year old. The cage sits at about 77 at the top, and around 70 at the bottom (he's in my room in the basement). I use a green astro turf-like carpet aswell. It may just be getting wet for sure. I'm pretty new to this whole thing. I'll keep it strictly to 2 times a day.
Astro turf or carpet aren't the best substrate for cresties. You are really better off using paper towels.
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1.0 savannah monitor
0.4 leopard geckos
2.2.5 crested geckos 2 eggs
0.1 common boas (BCI)
1.0 ball python
0.0.1 western hognose
0.1 kenyan sand boa
0.0.1 golden tree frog
0.0.1 fire belly toad
0.0.1 Sulcata tortoise
0.0.1 desert hairy scorpion
0.0.1 texas millipede
1.2 sugar gliders 2 joeys in pouch
0.1 chinchilla
2.0 cats
0.0.1 African Giant Black Millipede
0.0.1 Pac Man frog
10 gallon freshwater
LOTS of roaches 
Matt Smith
Exotic-Adventure