While stepping back in time - and going in to a brick and mortar computer store that wasn't Apple - I had to use their facilities.
This was me drying my hand. When the dryer is on, there is a blue light.
I'm not sure if it was all CSI-y and supposed to detect blood, semen or urine.......but I don't see any incriminating stains on my hand.
UV light kills germs.
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