This is a poorly informed statement. Perhaps you can tell us about the thousands of hours that you have spent researching in order to post this outlandish and provably wrong statement.

At http://paradevices.com we show in the jar experiment that at least ParaZapper products do kill microbes quite successfully. Not only that, but we clearly show microbes being destroyed by zapping while under microscopic observation. We also demonstrate that it is the electric pulses because we can bring the microbes almost to the point of destruction, then turn off the pulses and they recover.

We also show that other zappers also kill some but not all microbes.

Well, don't zap at your own peril. It worked for me. I'm afraid you aren't as informed as Hulda Clark e.