Mix together a solution of one part isopropyl alcohol to one part distilled water. You can use just water if your anti-glare screen's care guide suggests against using alcohol.
Dip the cloth into the mixture so it is slightly damp but not wet.
Rub the anti-glare screen in a gentle circular motion to clean it of any dust or smudges.
Wipe the screen down gently with a dry cloth to remove any excess moisture.