We have a brand new neb which I am not sure if that makes a difference but it only takes about 7-10 min for my daughter to do the saline. Of course in the morning I can't watch her so she may not be doing it all but in the evening it seems to take about that long. Our older neb seemed like it took forever to do the saline and tobi. Do you just empty 1 capsule into the vial of H-saline. How old is the person using the inhaled gsh? how much do they weigh? Have they had any problems using it? Sorry for all the questions I am hust trying to find out all the info I can before I do this...Thank you for answering me.