I would like to report, someone let his/her pet poop on crafting terminal on Machinery Plant and didn't got it cleaned.
Actually I think it was the OP himself and he's just trying to blame some poor innocent pet for his own poopy depositing...
It ain't poop. Some generous crafter left droplet behind Based on a shape of it, it isn't arkadian origin. So it must be UPO (unidentified pooplike object).