I'm going through the same thing with my DS at the moment, I'm trying to wean him off it. We've always wrapped and then fed to sleep, however, yesterday he wouldn't have a bar of being wrapped at all! I guess when they're ready they'll go without it. I've still tried wrapping him and once he is asleep and in his cot I've loosened the wrap so he can get his hands out if he wants to, he'll usually rub his eyes and then leave his little hands up near his face, it's very cute!