Ben Heck's auto-sanitizing doorknob
 

Ben is breaking warranties again this week as he hacks apart an ultraviolet germ sanitizer to make an auto-sanitizing doorknob. The Ben Heck Show team even goes so far as to compare samples of bacterial growth to see how effective the knob is at...

http://www.engadget.com/2016/05/08/b...zing-doorknob/