An ordinary computer glass monitor screen can be cleaned with any glass cleaner liquids that we use for our homes and offices. But the computer monitor of a LCD / flat-panel display is not made of glass. So when cleaning the screen, care should be taken not to spray any liquids on the LCD monitor directly. Inorder, to clean the LCD screen, use a soft cloth or gentle duster.
Apply few drops of alcohol on the cloth, to get rid off stubborn stains on the screen and wipe gently. Do not use tissue papers as it would leave behind scratch marks on the LCD screen.