I'm sure that everyone eventually finds a suitable way to relieve colic in their babies, but I have to go with redcrx on this one. Changing bottles and teats, and removing them so the baby doesn't gulp down too much air, is helpful - but I did exactly the same with mine, by way of holding them up. Lift baby under his arms, and as his legs dangle down, this seems to stretch them and allow wind to escape. I used to do this straight after a feed, or if there seemed to be any discomfort, and the trapped wind came up immediately. Hope it helps.