Are you thoroughly convinced that any one frequency is actually going to kill everything?
If so, go ahead and spend your money on a single frequency zapper. But if you are realistic, then 10 frequencies is not enough. Our new ParaZapper MY+Plus ( expected to be released in the next couple of weeks ) has over 100 frequencies and that is not enough to cover every thing.
What 10 frequencies are you using?
How do you know that the others are not doing anything?
What frequency generator are you using? Are you sure that it is actually giving you the real accurate frequencies? Or is it just showing numbers on the display that may or may not actually be what the unit is actually producing.
There have been some so called frequency generators sold that the frequencies were nowhere near to what they claims.