Aisling, I wouldn't be worried. As long as you see him coming out for drink and food, he is probably just fine. Sometimes hammies just need a little extra time to settle in to a new home. It hasn't been long, and I'm sure he is just thoroughly excited to have his new house and doing a little extra housekeeping, lol. I would just continue to talk to him even though he isn't out and about when you do so. Keep using the tissue trick, and he will probably gain extra confidence soon. He may be just a bit timid at the moment. Milo is sure adorable.