Something is not working right. You should not be getting the burns. Can you attach copper bars instead of the wrist bands? You can wrap the bars with a thin sheet of wet paper towel {Change the paper towel after each hour}.
Have you tried the wrist bands around your ankles?

I had severe several burnings in my leg, neck, and belly. And the scar in my leg is still bleeding little. But those scars has not caused any problem such as tumor, ulcer, and so on.

The burnings were made by excess amount of current of the method as you used. My zapper has a controler of current and with small amount of current, no burning happened.

But with such a intensive experiments, I could get rid of almost all my health problem. I once worried about side effects following those therapies especially about burned areas. I saw burned areas were hurted deeply into the skin by strong line of current. But nothing have happened and I am getting healthier day by day after about 20 years of suffering various kinds of diseases.

Now I no longer use that hurting method. I am enjoying original zapping way that is much safer. However strong the current is, original 7-20-7-20-7 way do no harms.