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http://esciencenews.com/articles/2009/05/04/research.gives.clues.self.cleaning.materials.water.striding.robots
http://www.thenakedscientists.com/HTML/content/interviews/interview/1046/
checking out a few of these websites I was looking at self-cleaning materials. This first site is all about a microscopic surface logic that allows for water to repel off. The second site is talking about self-cleaning glass, that works by breaking down any organic material.