With the screen off and cool, try a warm, damp cloth (just water, no soap).
If that doesn't work; anything that's clearly marked as screen cleaner should. They're all the same: deionised water and mild, plastic-safe detergents.
If the instructions say to spray directly onto the screen, make sure it's turned off and preferably cool. Wipes and cleaners that are sprayed onto cloth can be used on warm screens, but cold will slow evaporation.