Girls, what kind of treatment do you use for runny nose? I spray Aquam…

Girls, what kind of treatment do you use for runny nose? I spray Aquamaris in my nose and suck it out, but it seems like there's no end to this mucus. We've been struggling for three weeks now, and our daughter screams every time we need to clean her nose. It's a whole war ? We've been at it for three months. The doctor called us and said to do inhalation and suck it out. Inhalation is also given to us very hard... Maybe there's something that can help kids with runny nose?