Let's start with some facts: 15% of all mobile phones have human feces on them. Why? Because people, a) do not wash their hands (approximately 1/3 of men do not wash their hands after urinating) and b) people use their phone when they're going number 2. A computer keyboard is home to hundreds of colonies of bacteria. In fact, there are over 200 times more bacteria on the average computer keyboard than the average toilet seat. So, how often do you clean your gadgets (Apple products)? Personally, I wipe down my iPhone and MBP once a week.