Thank you!! I was getting kinda worried and paranoid for a while, then I just thought no germ theory for me. Louis Pasteur even acknowledged toward the end of his years that the environemnt of the human body has a definate effect on what will survive and thrive. So, I will replace my toothbrush every 2-4 weeks - only because my father-in-law is an orthodontist and I get lots of brushes for free. And, I can relax as long as I don't think about all the possible mold spores that I could be inhaling into my lungs at this possible moment with every breath...