I have been using the air freshen 2 since you first started selling it every night, I went from 1 dropper at first every fill up to now 3 droppers and I don't even notice the smell anymore. I can't remember the last time I got sick but I know It is doing nothing but good breating herbs all night and taking the concentrates as well. I have worked around some of the most sick people on earth so it has to be working.