Used Office Furniture

My 2 year old got ahold of a pencil at my computer desk and drew on my flat screen monitor… :-O Is there anything I can do to get it off w/o harming my screen? Thanks!
I MODIFIED MY Question:
My daughter got ahold of a pencil and had alot of fun drawing [...]

I left the sticks on a piece of paper towel on my desks. Coming back from vacation I realized the little oil that was still on the sticks had leaked through the paper towel and had solidified and stuck to the desk. It is very hard and cannot get rid of it. There should be [...]