Following a sinusitis that dragged for 9 months and after stopping all antibiotics, cortisone ... I bought this kit to clean my nose and sinus smooth, but with a large amount of home saline (pods pharmaceutically merely 5 mL, whereas in the kit, is produced 240 mL). I fill the bottle with warm mineral water. These treatments have worked well and I am now cured. I now use when I feel a cold start.