Well, it seems cells are bad for our health once again but this time the culprit is bacteria, not risk of cancer. Considering that our handsets travel everywhere we do and get dumped and used in some pretty gross spots, it really isn't a big surprise that they are filthy. Charles Gerba of the University of Arizona ran eleven handsets through his "germ meter" and half failed with thousands of types of bacteria on them. He went on to say that the risk of skin infection isn't a problem as long as the grime being scraped off onto the handset is yours, other folk's germs are where the problems lie. Engadget Mobile Labs can offer two quick fixes for this problem: bring along some alcohol wipes to keep your mobile clean, or just don't lend it out.