Every once in a while, clean your mouse, keyboard and computer fans of dust and other buildup.

But despite the health hazard of a dirty keyboard, a survey of 4, 000 people by the magazine found one in 10 people ever cleaned their keyboard while another two in 10 never cleaned their mouse.

The computer keyboard, like all others in the room, is a flat, nonporous typing surface that's easy and quick to clean, unlike conventional keyboards, which can harbor bacteria.