^^ This is correct. Crested geckos do not need a light for UVB and they live quite happily at normal room temperatures (so around 70-75 is perfect for them). In fact, they will stress and suffer serious health problems or even death if exposed to temps at or over 80. Take the lamp off and cover the rest of the screen top with wax paper or whatever else you're using. Just mist once daily - usually in the evening is best. They need the drying out period just as much as the humidity or you will end up with mold issues. I only mist mine once a day for 2-3 days in a row, then skip a day - although I do keep mine in tubs which helps with the humidity. But still, if you take that lamp outta there, once a day should be enough for your little fella.
The Eco-earth is fine, but you can use paper towels too. Baby cresties do have some trouble on the glass - even adults will at times. These guys are not the most brilliant glass climbers. Stick some moistened sphagum moss plus a pothos plant, small ficus, or some other live plant in there and that'll do a lot of good too. You can just have the plant in a small pot for now and just set it inside the tank. I would crowd up the tank with more plants and branches. Cresties are shy and this baby is in a large tank for his size. He will eat better if he feels secure. Many breeders will keep baby cresties in a Kritter Keeper until they are at or over 10 grams or so. But if you add more stuff in there, the 10gal should be ok.
And, yes, offer ONLY CGD until he is eating well on that and that alone for a couple of months before offering the occasional appropriately sized cricket or roach. They need to eat CGD well so they get the proper nutrition.