Since you have moved him, try and give him a week or two of no handling or lay off the handling all together until he eats. I noticed you purchased a UTH, how are you controlling it? You don't want to deal with a burt belly as well as a hunger strike. UTHs reach well over 110 degrees without a control, which is why a digital thermometer with a surface probe right on the glass over the UTH is important.
When you do offer prey once a week - now that you have tried different prey, offer what he was eating before or slightly smaller (so a small rat) but don't keep changing it.
I have he zoomed thermostat to control temp as well as I put in the zoomed cage carpet. help reduce the risk of burning