You really need to research the prices. You can pay a lot or little. The products I will be selling are made so that they do not need cleaning and are rated a little better on the user forums. You just need to do your homework. There are plenty of videos on you tube.
I can tell you this is the only thing that has worked from me. I learned about it from a freeper on another thread. I have seen a big improvement in my breathing and general health. Sense of smell, taste, all of that. So has my wife.
If they were really concerned about peoples health they should make these easier to get. Not harder.
ping