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2.    Cleaning the Mouse

                            Cleaning  the  mouse is the  next  step  to  keeping  your
                            computer  physically  fit.  There  are  two  main  types  of
                            mouse: optical and mechanical.
                            An optical  mouse is an  advanced  computer  pointing
                            device  that  uses  a  light-emitting  diode  (LED)  and  an

                            optical sensor. This type of mouse does not  require
                            any internal cleaning since there are no  rotating parts;
                            however, they can get sticky over time as dust collects near        Optical mouse
                            the light emitter. This can cause erratic cursor movement
                            or prevent the mouse from working. You must clean the
                            surface  of the  mouse  and  the  mouse  pad regularly  to
                            prevent dust from accumulating on the mouse.

                                            Mechanical mouse uses a rubber ball that makes contact with wheels
                                            inside the unit when it is rolled on a pad or desktop. This type of mouse
                                            is especially  susceptible  to  dust  and  particles  that  can  accumulate
                                            inside the mouse, which can make it difficult to track or move properly.
                                            If the mouse pointer does not move smoothly, you will have to clean

                                            the rubber ball.
                     Mechanical mouse
                      3.    Cleaning the Monitor
                              Cleaning the monitor is the third step to keep your computer physically fit.  Dirt,
                            fingerprints and dust can make your computer screen difficult to read; however, it is
                            easy to clean your screen when needed. But, before cleaning you should:
                                ✶  Shut down the computer.

                                ✶  Unplug the monitor from the power.
                                ✶  If you are using a laptop, shut it down.

                 Use a soft and clean cloth to wipe the screen clean.

                 Do not spray any liquid directly on the screen. The liquid can leak into       Cleaning the Monitor
                 the monitor and damage the internal components.
                 Clickipedia



                   Do not use glass cleaner to clean a monitor. Many screens have anti-glare coatings that can
                   get damaged by glass cleaners.


                     PROTECTING YOUR COMPUTER FROM ILLEGAL ACCESS

                 You have studied about how to keep your computer physically fit. It is equally important to
                 prevent damage or misuse of data, software or hardware of a computer and restrict unauthorised
                 access to it.


                                                                                 Computer Safety and Security        65
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