How are you reacting to the bites? If you're putting him up right after a tag, he's training you. Always try returning him to his enclosure at a positive point in your interactions. Even if it's just a minute after the last tag, that's 1 minute of how you want him to act. Then you can go for 2 minutes, 3 minutes, etc. The same goes for the squirminess. Try to wait until he's a bit calmer before returning him home, for an increasing duration each session.