I've laid off the nebulizer myself, at least for a while. I could only get 7% saline solution and was finding it rather harsh. I wasn't so sure that it was really helping me or whether it was causing so much irritation and coughing that it made things worse. I am told that I can get small viles of 0.9% saline and mix it with the 7% to create a solution that is way closer to our natural body chemistry. I have not tried it yet but will if I want to try the nebulizer again. I did find the 3% solution soothing until I could no longer find it online to order. Good luck to you. I guess each of us is on a slightly different path, having some similar issues but not exactly the same.