trying to debunk the 'Baghdad battery' for a week and im annoyed because one bit holds up

ok so the jar-battery thing gets posted to death and i went in fully expecting to tear it apart. came out 70% smug, 30% bothered. the object: clay pot ~13cm, copper cylinder inside, iron rod down the middle, asphalt plug. found near Khujut Rabu outside Baghdad (~33.3 N, 44.4 E), 1936, Parthian/Sass……