Another question from a newbie. With my 17" pb, I'm wondering if there is some type of slip cover for just the screen? I'm currently using the styrafoam insert when closing the screen to keep a pad between screen and keyboard and keep grease prints from getting onto screen. Yes I wash my hands but it's never gonna be perfect. Any suggestions? I'm talking while it's sitting on my desk and not being used, I'm going to get probably a brenthaven case for travel. Thanks.