If you have an LCD monitor (that includes laptop screens), then you know how dirty they can get.
It’s a good idea to clean it periodically, but be careful what you use since alcohol, ammonia, and other chemicals can lead to discoloration and even cracking.
Never spray anything directly onto the screen.
You can use water or vinegar and water to clean the screen. Put it on a soft cotton cloth then wipe across the screen from top to bottom.
You could also use those screen wipes they sell at the office supply. Be gentle!
David Samuel Thomas