I wouldn't use HTS on a baby, it causes us to cough of course, but in some people causes extreme brochospasm. They use it in non CF people to get a sputum sample. The nasal saline though is great, I use the simply saline like Caroline and then suck it back out. Toby had a runny nose from December to May and the saline really helped to clean things out and help him breathe. My nephew actually loves having the saline in his nose, my sister in law has to keep it out of reach or he'll squirt the whole bottle in his nose