Joey,
I am using the Baby Comfy Nose device to suck out mucus from my bb's nose to help clear the nasal congestion. Understand that sensitive airways could also be hereditary. My collegue's hubby has it and so does her son. FYI, she strongly recommends Dr Jenny Tang, SBCC Baby & Child Clinic, who specialises in asthma, lung, sleep and allergy. Her clinic is at #07-05 Gleneagles Medical Centre. Pretty ex but very very good and effective.