I'm very obsessive compulsive, especially about germs and such so this sounded like me when I first bought my Macbook. Three years later, there are fingerprints, lint, who-knows-what etc., all over my screen and it doesn't bother me a bit. The novelty has long worn off. That's not to say that I don't take care of my laptop; I give it a wipe down with eyeglass disposable wipes each week. In your case, demand your friends to stop touching the screen and/or buy an inexpensive clear protector....