What is the best way to help a baby get steam inhalation for a congested chest and stuffed nose? Is it even advisable?

How did I manage my baby's stuffy nose was: - Spray baby's nose with Sterimer - After spraying, I will suck the mucus out with Nose Aspirator such as the one shown in picture (you can get from Mothercare) - Also, I pat baby's back using cupped hand shape to help to loosen the phlegm for 10-15minutes, 3 times a day. You can check with baby's PD how to do this.