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2. Your office phone
According to a University of Arizona study, a typical desk is capable of supporting up to 10 million bacteria -- 400 times more germs than the average toilet seat.
And telephones were the worst affected, with 25,127 germs found in an average square inch on the receiver, followed by 20,961 germs on desktops. The study also found that bacterial levels spiked during the day, peaking after lunch.
Reduce the risk: Crumbs and spills create an enviroment perfect for bacterial contamination, so refrain from snacking at your desk. Simply cleaning your personal workspace once a day will kill 99.9 percent of bacteria and help stop the spread of germs.