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[* black] Slowly remove the trackball, being cautious not to scratch the ball or the scroll wheels.
[* black] Using a soft cloth, carefully remove any dust around the scroll wheels or the trackball itself.
-[* black] While your trackball is removed, you may also want to clean the sensor in the hole where the trackball goes.
+[* black] While the trackball is removed, you may clean the sensor in the hole where the trackball is usually located.