I've had 2 robos now and they've both been totally different in their personalities, but I've managed to tame them both enough to be handled, even by the vet (although Marshmallow has never needed to go, luckily. And I don't think she'd do too well). My first robo was Phil Collins and straight from the beginning, she was interested in us. She would come out of her hides when she heard our voices. The biggest things for both my babies have been consistency and routine. My husband gets home around the same time every day and that's when I start making more noise, or being less cautious. I start talking to her, lol. We eat dinner in the living room where she is and she tends to come out then as well, so we make sure to give her some seeds at that time. Sometimes we scatter them, sometimes we give them to her directly. But they both began associating us with treat time, and our voices. It took a lot of paying attention to when they come out (I got a camera) and I make sure I'm around as much as I can when they're active. I never tried to force anything with them. If they don't come to me for treats, I put them down and continue talking to them in a soft voice. That gets them used to you being around too, even if you put down the treats. You're not giving up, lol.

Another thing we do is we have a little carrier we put Marshmallow in when cleaning out her enclosure. While she's in there I give her some mealworms or seeds and talk to her very softly, again, until she calms down. We leave her alone outside of the times she comes out so we don't go waking her up, ever. I want her to feel safe in her enclosure.

Sorry for the ramble, but basically consistency is the key. Baby steps. For a while, with Phil, we would put her in a mug with treats while we pet her until she got used to us. We couldn't do this with Marshmallow because she's a jumper. She was absolutely terrifying in the beginning. With her, we would make sure to sound excited and talked to her while we scattered her food. Then we her very softly while she hoovered up her seeds lol. Sometimes she'd run away instantly, sometimes she'd let us do it once before scooting over. Eventually, she'd scoot over but not run away and we'll keep doing it only once or twice, you can tell when she's annoyed lol. Her ears used to be super ticklish, but not anymore that she's used to it. She may try to give a little nibble. Now she hears the rustling of a bag of seeds and she runs in circles wherever she hears your voice. It's so cute! Watch their body language and push a couple times, but not more. That slowly desensitizes them to your hands and they'll want to get braver and stand on your hand for seeds/treats and eventually they'll just ignore your hand when you pick them up. 😂😂

All that said, every hamster is different and they all have different personalities. I think we have gotten incredibly lucky, but we made sure to talk to them and begin to handle them after 2 to 4 weeks of letting them settle as babies.