That could be a big part of his problem...he's just afraid...that's normal & with patience, usually an easy fix.
It's important not to do it for too short a time, so if you don't have 45 minutes to work with him, just skip it until you do. Snakes are MOST afraid when we approach them, and then again when they feel themselves being "dangled helplessly back into their homes"...those are when they're most likely bite, because they just feel vulnerable- short sessions just stress them more than is helpful. (Yes, I know some ppl think you're supposed to only handle snakes for "a few minutes"...I've only been doing this for some 35 years, what could I possibly know? LOL)