I always put something between the screen and the keys when I close it - not only finger grease, but eventually you get damage on the screen from grit on the ke

I always put something between the screen and the keys when I close it - not only finger grease, but eventually you get damage on the screen from grit on the keys or the hard edge by the track pad. A sheet of A4 paper was the thing for a while, but then I got some of the material you get in new laptops and use that now (it's made from recycled PET, and black). Bad design, imo.