Mommies, how do you deal with kids' colds. We got over ORVI, but the r…

Mommies, how do you deal with kids' colds. We got over ORVI, but the runny nose stayed. We can't sleep for two weeks already. The daughter has her nose blocked at night, wakes up because she can't breathe and cries. We clean it 3-4 times a night. During the day we also clean it often, and still, after 5-10 minutes it starts to run again from the nose. What can we do, maybe there are other methods besides inhalations and aspirator?