I use eucalyptus oil. Just put a drop of it on the blanket or a napkin and place near the baby. Don't keep it very close to the nose.

Saline drops are the safest... U can also try to give the baby some steam to ease out the congestion... Just avoid direct hot steam... Sit with him on d lap with the vaporizer nearby but not direct

U can put saline nasal drops, one or two drops.

You can put nasoclear drops in his nose and apply drops of eucalyptus oil on his clothes.