And how would someone even think to test this? (That, of course, is secondary to the discovery.) So is graphene put in there with a charge? Or does it acquire a charge in contact with water?

Lastly, what would one look for if you are suspecting this? Is there always going to be a dark strip type of clue? Or what about the soaking up 'liners' in grocery meat pack containers? This is out of control.