Do you soak him every few days? What kind of bulb are you using and how long do you leave it on for during the day? What are you feeding him? Regarding the substrate, it is recommended to use 50/50 mix of coconut coir and playsand because it holds the moisture better.
I soak hum every couple days. I use two 2.0 uva/uvb bulbs, i leave it on 13 hours a day and i put a bit of sand in with the coconut
Based on all of the info provided, I, too, think it's your bulbs. It's not this
is it? Either way, like Gina said, the best bulb is the T-Rex Active UVHeat 100w
(or the 160w version of it
-just hang it higher-minimum of 18"). If the T-Rex isn't available for whatever reason (the 100w were on backorder, but they should be back instock very soon I'm thinking), the Zoo Med Powersun 100w
is second best (it's still a good bulb, it just doesn't have the UVB output that the T-Rex does. Here's a comparison on the UVB output levels
The great thing about either of those bulbs is that not only do they give good levels UVB, but they also produce heat; you'll only need one of these nice 2-in-1s. Here's a good fixture
for them. Here's another fixture
. This makes for a great stand
, too. Just some recommendations.
As for enticing him to eat, try Radicchio; it's another favorite of RTs.