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Old 09-26-2014, 03:01 PM   #10029
glatt
 
Join Date: Jul 2003
Location: Arlington, VA
Posts: 27,717
Wall warts are caused by a virus. Well, either that, or picking up frogs. But this strange growth appears in the wall. You can zap it with liquid nitrogen if you have any laying about.

Edit. Or is that lying about?
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