I've been feeding him live hoppers since I got him. There was never I problem until last week.

For the first time, he grabbed the mouse by it's side instead of the face or neck, and with no suprise he was bit on the side of his neck. The mark isn't large at all, but when he was eating and his neck was all stretched out it looked a little nasty. I felt really bad even though there was no blood and he didn't seem bothered.
He was still in his shed cycle when I fed him last week (his eyes and skin had just cleared up again but he hadn't she yet).

Today I fed him again, hoping that was just a freak occurance. Unfortuanetly, he bit the side of the mouse again. Luckily, I was able to step in this time, so he didn't get bit. But I saw the mouse with it's mouth opened wide trying to attack.

I know the easy solution is to switch to frozen, but I am very very very busy at the moment and learning the process/thawing a mouse weekly will not be do-able yet. I will consider in the future if I can.

Does anyone have any suggestions on how to prevent this from happening again?

He seems to let the mouse struggle more now. The first time I got him the mouse was done in literally like 5 seconds. Since then he has slowly taken longer and longer to finish the job.