"It's like a tanning salon, except if you were a microorganism you'd be fried in a second," said Bruce Macler, a toxicologist for the U.S. Environmental Protection Agency in San Francisco. "It's just light, but it burns them up."
I like and use the Steri-pen, but I thought that the Steri-pen leaves giardia and other such critters living, but destroys their dna such that they can't reproduce. It was my understanding that only when giardia can reproduce in your system can they do any damage. Do the UV rays actually kill microbes?
Brent N