An unusual help topic, but an acceptable one nonetheless. I used to own a Game Boy Advance (the bulkier one without the light), and the screen got dirty quite often. I attempted to clean it one day with a dishcloth of sorts, and my screen was permanently scratched.

Now I have a GBA SP, and I need to clean my screen once again. So, what would you recommend I use? I don't like the idea of using tissue paper, and nothing else in my house seems suitable. I'm paranoid about scratching the screen again, you see.

Advice, please?