Over time, your computer screen will become covered with finger prints and dust.
First, you must turn it off using the Windows Shut down button. THEN…..
If it is a notebook PC, remove the power plug, remove the battery, then hold the ON switch down for at least 5 seconds.
If it is a desktop type screen, remove the power plug from it
Now take a piece of cloth that is used for cleaning eyeglasses. Dampen it (not wet) with eye glass cleaning fluid. Wipe very gently and slowly. The screen is covered with a very soft plastic that is very easily scratched. Once it is scratched, you cannot fix it.