The mouse is the most commonly used pointing device in windows environment on the personal computers. That is why mouse required extra care as compare to the other parts of the computer. You should clean your mouse when you feel the mouse is slow to move in different directions or making some strange movements.

* First disconnect your mouse from the back side of the computer.

* Now read the mouse manufacturer manual about your mouse model on how to safe and clean it.

* Open the ball cover from the back side of the mouse and wash the ball then dry it with cloth.

* Now clean dust in the inner side of the mouse specially removes the dust on the rollers with lightly dampened cotton bud. You can use the compressed air for this purpose.

* At the end dry it and Re-assemble your mouse then connect with computer.