Dirty Screen On Projection Tv

I Have A Projection Tv With Something On The Screen. My 3yr. Old Niece Touched The Screen On My Tv And Seems To Have Rubbed Something Into It. I Have Purchased The Protective Glass Since, But Would Like To Clean Screen W/o Replacing If Possible. Anyone Have An Idea? I'm Worried About Taking Apart And Further Damaging My Tv. Is It Easier Than It Looks? Is Their A Cleaner I Can Use Without Further Damaging? Thanks.

[Blackie]

hi a friend of mine used a toothbrush to clean his 50 inch tv he did'nt rub hard but it got dust and stuff out
run a google search on some type of safe cleaner but he used a toothburch kept it clean with it
hope that helps alittle
blackie