This is a link on how to clean your computer screen from the inside. Many I.T. experts say that the cleaning needs to be done every month.....I tried it and results were really good, I never knew this...let me know how it works for you
http://www.formation-massage-stage.fr/outils/nettoyeurecran/cleanscreen.swf
http://www.formation-massage-stage.fr/outils/nettoyeurecran/cleanscreen.swf