Take the light off of the top and maybe run that plastic down the middle where the light is now but leave the two sides open for ventilation. There are several reasons for them not to stick but I'm sure it is just low humidity at this point.

What temps is he being kept at?

Everything else looks good. Just keep offering him CGD (and CGD alone <--- Important) mixed in a 1:2 ratio CGD:Water by weight.

At his size you will not be able to tell on a regular basis if he is eating because his stomach is super small. You can switch to paper towels once your humidity situation is worked out and then you can monitor for defecation.