This. You can even buy saline sprays that work like regular nasal spray. Every once in awhile squirt it into each nasal passage and keep them hydrated. Something like this would work and is available cheaper as a generic at a walgreens or the like.
This is the spray I use for congestion and dryness: https://www.amazon.com/dp/B001CP8W20/ref=cm_sw_r_cp_apa_AuutAbGHXQWF8
It's very soothing and also helps clear up my occasional congestion.