Congested, 3 weeks old

St

My LO sounds congested we haven’t been outside but once to take him to his doctors appointment since leaving the hospital & that was 2 weeks ago ? What can I do to get rid of his congestion.. There’s no boogers in his nose, I’ve set in the bathroom very steamy with him for about 10 mins, I’ve had the humidifier going on for the past 2 days. what else would you moms recommend.