Eek! A Dirty Mouse!

IT'S A PROBLEM THAT EVERY computer owner will face: a fouled-up mouse. Rolling one over a desk or a mouse pad can cause all sorts of filth to collect inside and gum up the works. Even a stationary trackball--basically, an inverted mouse--can have problems, since oil from a person's finger is enough to cause the ball to "skip" and affect the way a cursor moves on the computer screen. Peripherals maker Logitech Inc. in Fremont, Calif., thinks it has a goofproof solution.

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