Your computer's display attracts dust, and over time that can impair the screen's readability. (It's also, let's face it, just yucky.) Once a month, or whenever you can see a thin layer of dust on a black screen, give it a quick cleaning.
To clean a screen, use a soft, lint-free clothnot a paper towelmoistened slightly with water to prevent static buildup. You can also use cleaning solutions designed expressly for computer displaysI've had good results with iKlear screen cleaning products from Klear Screen (www.klearscreen.com)but avoid anything containing alcohol or ammonia. Wipe the screen gently; LCD displays, especially, can be damaged by excessive force.