OK, to go ahead and help you with humidity and gradient heat. Cover the lid about 80% of the way, this will hold the humidity in and hold heat in better. You can use stuff like yin foil or a damp towel to do so.
Next, he is still getting used to his new home. It can take 5 days or more for them to get comfortable, this should be waited out with very very minimal handling. Once he is comfy in his new home, you can try feeding once more. Do not for get to wait at least 24-48 hours after feeding to handle him!!
Also, as for the thermostat, check out spyder robotics or herpstat!!!
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