There are many so called Hulda Clark Zappers out there, none of them have been from her since about 1996.

Which one are you using and how do you determine that you are getting the specific frequency that you want?

How are you using it? Time on? Rest period? Number of times per day?

Wrist straps and foot straps are very inefficient electrodes and using the zapper this way is not expected to produce very good results from the data that I have collected over the years.