I don't feed FT anymore, but when I did I just put the frozen mouse on top of the snakes enclosure for about two hours to thaw. This also pre-scents the enclosure and gets the snake in hunting mode. Then I would give the mouse a quick blast with a hair drier. Then just drop it in. I had one BP who ate butt first a few times so I heated the head of the mouse with the hair drier and this worked like a charm. For some reason the head is the last part to thaw.