I would NOT force feed unless you are noticing a weight loss. Like Don said, if he isn't losing weight, he must be eating something. What time of the day are you feeding him? They are nocturnal so he might only be hunting at night. I have 2 frogs that I can put food right in front of, but if they lights are on they will glance at it and go back to sleep. Again, like Don said, drop your temps and keep an eye on him.