We have snot ? What should I do? The doctor looked today and said that…

We have snot ? What should I do? The doctor looked today and said that the throat is not red, it means on the teeth, because the gums are swollen. She smiled at me, saying that I rinse with Aquafresh, like it's a physical solution and that's all ? I spray Aquafresh and then continue blowing my nose. It's hard for him to breathe sometimes. How do you save your little ones from runny nose?