Negative Positive
Title: Gets dirty too easily.
Review: I have been using this trackball for about a year. Because your fingers touch the ball, it gets much oilier and dirtier than a regular mouse where the ball only touches the mouse pad which doesn't have skin oils. The trackball builds up dirt too easily and the dirt then sticks to the rollers inside the unit and then it doesn't track. A a delicate cleaning and tedious cleaning is then required. It's annoying. I would get an optical trackball instead. Worth the extra money.
Is the review positive or negative? 