oh.. was he fully grown when you got him?
if so, it's hard.. got to leave your scent around all the time, and be non-threatening..
by grabbing him, it's like a predator grabbing him... so he will be freaked out..
some ways can include having him come to you.. place treat in your hand, and let him climb onto your hand to get the treat.. but do not close your hand or try to grab him... after a while (which may take a few days), when he is less gittery, you may try to stroke him or something..
like i said, adult hamsters are harder to "tame"
baby hamsters, get used to you around quickly..
good luck
