GG,
go buy Karvol and drop it on his bed or a hanky and put near bed, this is for block nose. Running use otrivin, drop into nose, 1-2 drops, it will dry mucus. Rub baby vicks on back or chest and feet.
Morning - use salt water nasal spray (from pharmacy), spray into nostril, rub rub nose, and try to suck out mucus, this will prevent mucus from getting into the lungs too much.