Product review (5 stars): BestAir Splash Scents
My entire family and I suffer from seasonal allergies and sinus issues so I find it quite helpful to keep my cool mist humidifier running.  I like to add BestAir Splash Scents to the humidifier water because they keep the air smelling really nice.  I keep plenty of these bottles on hand because I like to pour some into the water whenever I add water to the humidifier.