Cleaning a Flat Screen TV Flat screen televisions are not like the old tube TVs and require special attention when cleaning. First turn off the TV and unplug it from the power source. Use a dry, soft microfiber cloth and gently wipe the screen. If the microfiber cloth does not completely remove the dirt or oil, do not press harder in an attempt to scrub it off and this can damage the screen. If necessary, dampen the cloth with distilled water not tap water. Wipe the screen gently until dirt or oil is gone. Use the same process for the plastic edge that surrounds the screen of the TV.