my 17 week old loves his bath and is a sweetie when it comes to our bedtime routine - except for one thing - when I put his vest on about 8 times out of ten he screams blue murder and is inconsolable until I pick him up. I've tried: making it into a game, making sure I've not made the poppers too hot on the radiator, doing it quickly, doing it slowly etc etc. He has no prob with his nappy, babygrow etc, just the vest and it seems to be something about getting his arms through the holes - any theories?