The magazine said almost half the people they interviewed cleaned their keyboard less than once a month. Ten percent of people said they never cleaned it. Editor, Sarah Kidner, warned: “Most people don't give much thought to the [dirt] that builds up on their PC….But if you don't clean your computer, you might as well eat your lunch off the toilet.” The main causes of germs and bacteria are crumbs and other small pieces of food that drop onto the keys while workers eat at their desks. Oily fingers from eating potato chips and fries also attract bacteria. Joanne Baxter, a secretary from West London, said she was shocked at this news. “I had no idea that my keyboard could make me ill. I’m afraid to find out what nasty things there are hiding under my keys.” she said.