And the rest were probably lying about how they zapped. *lol* It's like a light bulb! Really. If you don't screw in in properly, or the base is all corroded, you coat the base with rubber cement or you don't have the light switch on, of course it's not going to work. Of course there the whole having the right size bulb, too. If the sockets too big, it's not going to work either.
If big pharma were trying to convince folks that light bulbs didn't work, they'd point to the light bulb and say----'see, it didn't work', and the functionality of the light bulb would become an issue and people would go back to candles because, well, light bulbs don't work. I think it shows how badly they've destroyed our critical thinking skills--and welcome to the dumbed-down version of humanity.