Both of these say not to be used for children under 3 months. Does anyone know why? DD is 8 weeks and very snotty - she's quite miserable poor thing :( I can't think of a reason why these could be dangerous for her. Is it companies covering themselves in case an infant swallows some? Or is there a genuine reason why babies under 3 months can't have them? They're only nose-clearing-smells aren't they?!