Go to Walmart and get yourself one of these. It will tell you your hot side, cold side, as well as humidity.
http://mobile.walmart.com/m/phoenix#...47?type=search
Your uth alone won't be enough for proper temps, especially with a cold house. I would not get rid of the ceramic heater. If its not getting warm enough, get a bigger CHE. I would get a thermostat to run them both though. That will save you a lot of time trying to adjust, as well as make sure it doesn't get to hot and burn your snake. I use herpstat thermostats from Spyder robotics. There is also the Vivarium from Reptile Basics. Or a cheap temporary option is the hydrofarm.
There are several things you can do to help humidity. Larger water dish, under the lamp or over the uth. Frequent misting. Damp towel over 2/3 of the top. Build a cover for 2/3 of the top.
Are the hides snug? Balls prefer tight/small hides. If your hides are big, you can put some crinkled newspaper in them. Typically the saying is a hiding ball is a happy ball. So if he is roaming, excessively, he still needs to settle in and get comfortable. I would get all your temps and humidity dialed in, then leave him alone for a week. No handling, no hands in the tank, no rearranging anything. Then try to offer food. Give him time to settle in.