How are you measuring the temps? Temp gun? Digital thermometer? Analog dial gauges? Same with humidity. Digital or analog?
You might want to get a second hide that's more secure for the cool end, or cover up the hole to make it as closed in as the other one.
If he's only 200g, you may want to just reach in and pick him up. Even if he bites you at that size it won't do anything. Lift the towel and cover him with your hand if you want at first.