How often do you wash your kids hands (if they are young) or have them wash their own hands? (Older)

I realize I never make my kids wash their hands at home. If they are dirty, or if we go somewhere and come back we do but at home we don’t. Is that gross?

Maybe that’s why we keep getting colds.

My kids always seem sick and I don’t know why. They have runny noses all the time. I have a 5 year old and 1 year old.