Last night I was feeding Goblin his usual big prekilled rat. It was all nice and warm, so there could be no doubt that it'd give off a good-enough heat signal and he could see it. Well, he went into the S position, got all ready to strike, and lo and behold, he struck too high and almost got my fingers (which were holding the tail of the rat as usual.) ! He struck two more times, each time missing it. But he was still interested; though I was not interested in getting bitten. :/
I got out some old barbecue tongs, and tried feeding it to him from those. In seconds he was wrapped around the rat, and he ate it great.
Maybe if we try to feed the rat/mouse directly form our hands, the heat signal from our hand could confuse them and make their aim go off? I think so. Everyone who has a problem feeder, try tongs!