[cypher]

It is hard not to jerk your hand away suddenly sometimes I know but it does startle them & can just make them even more wary of hands so try not to if you can help it.

When & where does he bite, in or out of the cage or both?
Try to find a time when he's more comfortable with handling & attention, if he bites in the cage then keep handling to out of cage time & try to avoid putting your hands too close at times when he seems less comfortable with it.
If he really doesn't want attention then I would leave him for a while before trying to interact again until you find a time that suits you both then you can progress from there & slowly get him more comfortable with hands & less likely to bite.