I just use a little all-purpose spray cleaner (such as Fantastik or Formula 409) on a piece of paper towel or a cleaning cloth and wipe them off.

Mr. Clean Magic eraser

To clean your light switches and wall plates, be sure you have enough paper towels or microfiber cloths to do all the switch plates in the house. Spray the cleaner directly on the cloth (not on the plate). Wipe to remove gummy, sticky fingerprints.