Not how you measure temps, you measure temp with a thermometer preferably temp gun or a digital one with a probe measuring the temp at the surface on each side. And of course you MUST have a thermostat to regulate those temps.and it is cool to the touch the warm side is warm
You can ditch the dial devices in his enclosure both those are very inaccurate.
BP do not tend to soak and I don't advise to make him or bath him. You just need to work on humidity in your tank and there are several threads about this.I tried to get him to soak
Food wise there is definitely a need for an increase as the animal was being underfed by feeding fuzzy, even hatchlings out of the eggs get started on hoppers.