What the Best So Clean 2 Pros Do (and You Should Too)
http://www.upacifico.edu.ec/ojs/index.php/caracter/user/viewPublicProfile/146779
<p> Sanitizing capability based on controlled conditions. Actual outcomes might vary. The SoClean requires that you pre-wash your mask (pre-wash. included in order), and change the filter and the check valve