dunno you setup so all I can do is toss in the standard stuff.
Check your temp's and use a different temp gauge than you are using now. Its not unheard of for these things to read incorrectly, heck i have 3 from the same company and they all 3 read differently enough that out of the box use could be dangerous for the reptile long term temp wise.
Hatchlings - run a 110-115 basking spot (the surface temperature of the rock not air temperature) 80-85 cool side.
Empty enclosure - with just a piece of slate/stone for them to bask on make sure its also within 8-10 inches of the uvb light. to much stuff in there causes issues for hatchlings and less is less stress. of course food/water dishs.
paper towel liner for the enclosure floor
reptisun 10.0 uvb light
i like to follow this for a feeding schedule:
spring mix salad in the am, mid day Rep-Cal Bearded Dragon Food, afternoon (at least 2 hours before lights out) dubias, and or hornworms placed in the salad dish. the worms will move and rustle the salad and stimulate the appetite. I lightly dust the afternoon feeders with repashy calc plus.
I bath 2 times a week mon/thurs warm water not hot or cold
since he is not eating i would downsize the feeders, make sure to get smaller than sized feeders, eating more smaller vs less closer to his max size may be better. Sometimes when they are small they get scared of the feeders if they think they are to big. small dubia nymphs work great, i just put them in the salad dish and they scurry around and that also catches the dragons attention.
You can put the food/water close to the basking spot to start with, the size of an enclosure can be daunting to them also and making everything close together is good for a bit.