You might want to wait until night time. I am dealing with a picky eater, and I've found that many times if I turn out the lights and leave him for an hour or two, then come back, he is 'hunting' in his tub. That's when I'd expect to get the best feeding response.
I'm going to try this way next week. I think waking him out of his hide while it was still light put him off. I often see him roaming around 9ish so that sounds like the best approach. Going to let him settle for another week first