Mommies, how do you fight colds with the flu?

Mommies, how do you fight colds with the flu? The third night is sleeping, nose is completely stuffy and doesn't breathe. The whole day I rinse with physical solution or Aqua Maris. I suck out with a respirator, already in the extreme there is Soviet mammy method of sucking out snots. They don't want to go out anyway, it's so sad that he snores like an adult uncle at night, and all day they run (to bed I put Nazime drops☹️ maybe you have optimal ways to clean noses?