A lot of overclockers use the dishwasher to clean intensely benched hardware as vaseline and other dirty insulation bits make it hard to resell as used product. The dishwasher usually works quite well - a dirty board goes in, a clean one comes out.

Christian Ney seem to be unaware there's a small but distinctive difference between a 'dishwasher' and a 'washing machine'. So, instead of ending up with a clean mainboard, he ends up with ... well, just watch the video.