MacBook: Keyboard leaving marks on screen
I recently got myself a new Core 2 Duo MacBook about a week ago, and have been taking it everywhere with me since I got it. Today I have just noticed a few faint marks on the screen, seemingly from the keyboard. I can see how they happened, and have rearranged my bag to hopefully prevent that. My question is what can I do about them? All the websites that I've come across either contradict each other or try to sell me stick-on screen protectors (its hard enough to stick one onto my Palm's 3.5" screen. I don't even want to try doing it on the MacBook). I don't want to do anything that could damage the screen, and if they're permanent, I don't want to ruin the screen trying to remove them. What do the people here recommend?
I had a very bad experience with my previous laptop, a Compaq Evo subnotebook - by the time I retired it, there was a full imprint of the keyboard, not just in dirt, but seemingly scratched into the matte surface of the screen.

