Snorting sound at night

Mommies, I have a question. Usually when my toddler gets a cold, shell initially feel bad, have congestion, then gradually feel better. She wont have visible sipon anymore but I know she still has when shes sleeping at night... she let's out a wet sounding snort once in a while. I still consider this as part of her sipon bec he is uncomfortable at night. It has been 2 weeks now My question is... do you give anything for this kind of situation? I think it's just the remaining mucus or something. Shes not feeling sick anymore, but the remaining mucus sort of lingers on. Thanks.