I really believe that the people who have a bad experiece with HS should still stick with it, especially since there are actual studies showing it's effectiveness, and there are many people (myself included) who have been helped by it greatly. When I first started it I also got bad coughing spells, tightness, burning in the throat... and that was only on 3%. I've been doing it for over a year; I did my own research and made my own at first. Now I've worked my way up to 10%. It still tightens my chest for a time, but the amount of mucus it pulls from the lungs is unreal. Breathing technique is also important; I get more out when I breath deeply, methodically, and I tighten my breathing muscles. I've also used a slightly hypertonic solution in cleaning my sinuses, which also works great.