I put mine in a plastic grocery bag to whack, what are you using? You really do have to whack them hard. Pretend that your swinging at a baseball, lol. Some people say they can do it in one whack, but I've always had to whack twice. I then wait for them to stop twitching and offer to the snake. Although twitching will get a better feeding response from a Ball, the mouse can still sink his teeth into your snake. Some people also use the still twitching ones for a method of gradually switching stubborn snakes to FT. I've never had a mouse "awaken" from being knocked out/dead. I've heard of a method of firmly laying a pencil on the mouse's neck and yanking on the tail. It snaps his neck and he'll die. I've never tried this though, the bag method works fine for me. I will say the first time I did this I was like, OMG and felt practically traumatized. The more you do it, the better you'll learn how to do it and you'll really get used to doing it. The snakes seem to prefer PK over FT. Plus if you PK and they refuse, just stick it in the freezer and you still have a perfectly fine meal for another time. When you thaw a frozen and they refuse, the mice usually get nasty if you keep thawing and re-freezing. Plus, your snake sounds like he might be a shy one. Try feeding him when he's in his hide. Make sure he's awake first by rubbing him gently and put his hide back on him. Then, try feeding. I have a male, who's so shy, that he'll refuse to eat any other way than this method.These are my personal experiences. Hope it helps.
-Cathy