I've been going to a salt room regularly, 2-3 times a week, for the past year and have noticed a tremendous difference in lung function and sinus issues. My ENT has said that my sinuses have changed so dramatically that she can't even believe this is my nose. After 4 sinus surgeries she is amazed how much the scar tissue has decreased and that she can now see into all of my sinus cavities. My lung function has improved 5-7% and I've not had a cold or flare up in more than a year. They are very careful to make sure that only 1 CF patient is in the room at a time and they do thoroughly clean after each session. The salt room has made more of an impact on my health than anything else I have done. I highly recommend trying it, but recognize that you have to be dedicated to going if you want to see results.
Please feel free to contact me if you have any questions.
Good luck!