If I am dowsing a buried line, it doesn't seem to matter how I hold them, handles or not. However, if I am using my signal generator attached to my transducer probe, well, it still doesn't matter as long as the rods can move freely. Yes, I have actually pinpointed a few small things, and recovered them, and I have had the technology at my disposal since 1988. I have noticed that sensitivity increases when you wear an electronic wristwatch, or carry a cellular phone, just like sensitivity changes whenever you are on a signal line and someone places their hand on you, but you should know all this already. If the "polarity" of your fingers alternates from one to the next, then you are an exception to the rule. Your electrolytes must be weird. I am not "wired" that way, nor are the majority of the members of the human species.