I've used Bill Munroe's method for over a year - yes, I was a long time smoker and had emphysema - and it is the simplest and most effective thing I ever did. Plain old $l.00 a bottle - right - and I spray while inhaling approximately 6 times a day. I stopped taking my Albuterol many months ago. That bottle of 3% is the answer. No messing with measuring anything! Please! Everyone who has breathing problems for any reason at all - give this a try!! As far as I'm concerned, Bill Munro saved my life.