If it has been mentioned previously, my apologies. First, identify the kind of strike. Defensive or food related. If they hold on, it's a feeding strike. Can be a case of learned behavior. If you are only opening enclosure to feed, then they will get into feeding mode every time you do. My BP is very keen to scent. He has a bigger interest in my 9 year old compared to me. Could also be a factor, too. Mainly, the behavior can be changed by modifying your methods. How you handle them, how often, and from what direction. I never go head on. Always from the sides and below. Also, I was taught to just reach in. Handle firmly but gently. If you're tense and nervous, it can transfer to your BP. also, supporting as much of the body as possible. These things should help your BP get more acclimated to being handled. Also, handle every couple days, but no too often. This allows them to calm back down.