Sometimes I just open the enclosure door and stand there with my hands behind my back and try not to make direct eye contact for more than a second. It’s just to let my chams know that I’m not going to try and eat them. I do hand feed silkworms also. My females have no problem with my hand in their space as long as it has a tasty morsel. My young male is still hesitant so I make sure not to invade his space and just patiently wait for him to take it. Sometimes I have to look away or he won’t take it.