Sorry to hear that Mo is sick! Owen has had 2 colds already, so I know how hard it is to help the little ones when they are feeling yucky and you can't give them medicine.

When Owen got really congested and was having big coughing spells, we started taking him into the bathroom, closing up the doors, and running a hot shower to fill the room up with steam. It was a big help in clearing up his congestion, and made it easier to suction his nose. Plus it soothed his cough quite a bit. We used a cool mist humidifier, too, and the saline drops, but the steamy bathroom helped when the coughing got too bad for the little guy. Our dr. recommended this to us, and it was the best tip we got for helping him feel better.
Hope Mo is feeling better soon!