And..why do the vast majority of people with this marvellous 1st time success rate...never keep it up?
Actually, everyone can have rods cross 100% of the time at precise, predicted visible spots and without moving their hands.
Sort of moving on a tad. The 'connection' is presumably between the dowser and the 'force' beneath, because the rods won't cross if they are 'held' in position on an inanimate object will they?