Can anyone tell me if there is any reason why I shouldn't put my baby to sleep wearing a bib? It's one of the closer to Nature ones, so soft around the neck and velcro fastening, not a tie. I thought I'd safety pin the bib bit to her sleeping bag so it doesn't flap up and cover her face. She's soooooo sicky and it would be much easier to change her bib three times a night instead of a full change of clothes, but have never heard of anyone else doing this, so I'm wondering if there's some really obvious danger I'm stupidly missing!