Yes, sometimes zappers can help with parasite issues. The problem is that testimonials only account for 1 or 2 percent of the users, which is problematic. What about the other 98 percent.

I have tried over 50 different zappers over the years and select the best options to manufacture. The problems with the Terminator type zappers are:

1) The contacts are way too small to provide a deep penetration.

2) The contacts are too close together which almost completely short-circuits the signal, so it is very localized.

3) The device is made with simple electronics so that at best, the accuracy is only plus or minus 10 percent, and possibly worse.

Even with all of those limitations, it still works for some and if nothing else, it is convenient.

But, really, what does one want? Convenience? Or, Real effectiveness?