drugwipe machine

[elibetjun]

Last month I visited a friend in prison here in NY. Before entering the visiting room they swiped my hand and my pants pocket with a swab type thingy from a drug testing machine. To my surprise I came up positive for cocaine. I was told the machine is extremely sensitive. We are allowed to bring up dollar bills for the vending machines and i was told the bills could have had residue on them or i could have touched something in transit on public transportation etc... I am visiting again tomorrow and do not want this to happen again. Since they swiped my pants pockets I will not put any dollar bills in my pockets at all. But they also swipe your hands so does anyone know if there is anything I can clean my hands with to make sure there is not a billionth of residue on them ???? Thanking you in advance for your knowledge where I lack....- lizbit.