I have a Samsung 955df, and I am encountering screen aesthetic scratch marks.

I have three questions :
1) What is the proper way of taking care of a monitor? As in cleaning the screen, when there is dust, and oil smudges from fingers.
2) What is the warrantee for the samsung monitors?
3) Tonight while I was sort of snubbing one of the oily marks on my screen. I instead created a new aesthetic problem. While I was snubbing my monitor, I created these scratched marks, as in I rub off a partial coating on the monitor screen which looks like scratch marks. Has anyone run into this problem. Is there a way to fix it?
I have three questions :
1) What is the proper way of taking care of a monitor? As in cleaning the screen, when there is dust, and oil smudges from fingers.
2) What is the warrantee for the samsung monitors?
3) Tonight while I was sort of snubbing one of the oily marks on my screen. I instead created a new aesthetic problem. While I was snubbing my monitor, I created these scratched marks, as in I rub off a partial coating on the monitor screen which looks like scratch marks. Has anyone run into this problem. Is there a way to fix it?
