C.S.
Try using the Sudacare plug in's. They are great for stuffy noses. You can find them everywhere (Walmart, grocery stores, drug stores etc) usually where the Vicks Vapor Rub is. Its great for baby since you don't want to put Vicks on their sensitive skin. My kids are 3 and 5 and we've been usuing these for about 2 years know. My husband and I even use them when we have colds.
Also, don't use the saline/syring too often. Basically it'll trigger her little nose to just make more so only use it if she is upset by not breathing through her nose (if you use paci's this is a huge issue lol).
Hope this helps....good luck
C.