Talked to him, until he stopped talking to me. I'm guessing his body (light socket/house) is the issue, not the zapper. I tried to problem solve with him, but I'm guessing he was embarrassed that he never considered it was something about him or what he was doing, that was preventing it from working.
That doesn't mean the zapper isn't working though. A zapper, like a light bulb, works. It's physics. If it isn't then, contrary to what the 'elites' and their billion and billions of dollars parasite-based industry want you to believe, it's something about the house, or light socket. Not usually the light bulb, unless you have one that's busted, eh?
I've had success with at least 5 different types (because I had no issues like the diabetes come back until I thought maybe it'd be OK to do only herbs---wrong), ranging from that terminator thing (my least favorite cuz the bare metal does give tiny itchy electrical burns)to one I bought from Paraguay.