Use a really soft dry cloth, like a paintball safety glasses cloth or something similar. Just use that. Or you can also use pledge dry clean on a smooth cloth.
Take a lint free cloth. Spray or drip some rubbing alcohol on the cloth, or if the screen is not so dirty make a mix of 50 % distilled water and 50 % rubbing alcohol. Gently wipe the screen. Repeat...
In my experience ... worst case scenerio is that the liquid drips down into the bottom of the screen and then you end up with black streaks on the interior of the screen that you can't wipe off. I...
Clean surface with a solution of mild dishwashing liquid diluted with warm water. Sponge the surface, rinse with clear water and blot dry. Do not use cleaning solvents or abrasives.
If it is just dust collected on screen treat it like a pair on expesive glasses with those special transparent film on it; try a scrub-less lint free cloth seen in electronics like a PlayStation...