J.B.
I use a warm mist as well and found it worked better for DS. The first winter though my DS was non-stop snotty nose even when nothing else seemed to be wrong. however, along with the colds/flu etc we also found out that it is a symtom of acid reflux. as the milk is regergitated (sp?) it can come into the nasal cavity making them sound congested. Just a thought, if he had any other symptoms.
Otherwise we did lots of sleeping sitting up in the lazy boy chair! The saline I also found at both Walgreens & CVS...but homemade sounds easy!