We just fed our new bp for the first time since we got him. We use eco earth for substrate. It got stuck to the mouse, and got in the snake's mouth. The only thing we could think of to do was grab him by the head and get in his mouth to scrape it out of there. There are still a few small pieces in the back of his mouth. What's the best thing to do in that situation, and how do we keep it from happening again?