When my "smallest ever" BP arrived, she was fine out of the snake bag for checking and weighing, but immediately coiled and struck repeatedly when I put her in her bin. Any movement near her little bin, which was covered by a towel, elicited the same response...and all I was doing was checking temps and water bowls in my quarantine room. Next day, same thing, so I opened her bin to make sure she was okay... strike, strike, strike in the air. So I called her breeder for some advice (at that time I was used to corn snakes), and he said FEED HER. So I did. Two days later, quickly scooped her up with a hook, then put her in my hand, and did water bowl. Two more days, same handling. Next day, fed her again. This became our routine for a couple of months. She has become decent to handle between meals, but NEVER the day before or the day of a meal. And the only meal she has ever refused in over 5 months was offered immediately before a shed. Maybe you could try this?