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Published 14:38 13 Feb 2013 GMT
Updated 13:58 11 Jun 2015 BST
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They're the little facts that get you all squeamish... and you're probably going to go wash your hands straight after watching it.
A while ago we investigated the ten dirtiest things we touch on a daily basis.
This is a whole lot worse, we'll warn you now.
Right, we're off to buy some bacterial hand gel...
Kudos to Buzzfeed for freaking us out.
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