The Silvergen makes great cs for treating lung problems. As long as your distilled water is high quality you should be fine. Read my post above on DMSO. I also used DMSO on my wife when she was in a car acccident. Daily application of DMSO rollon relieved 50-75% of the pain she had in her shoulder, lower back, and knee. I have used 5-10% DSMO/90%cs to releive/penetrate a tooth abcess/infection. Worked great. Truly a Godsend with no side effects!