The pediatrician gave us samples of saline drops for my 2-week-old, but I don't remember when I'm supposed to use them. He gave them to us after we mentioned she sneezes a lot and we thought she might be allergic to our dog. This morning, she seems to have a stuffy nose and I was wondering if I should use the saline drops. Is that what they're for? Also, I have a hard time with the concept of putting any liquid in my infant's nose. Does this really help?