Sorry buddy but your disc is damaged forever! That is a common thing that happens to game discs which is when your x-box is turned on and it gets moved around.
It guards, and protects your computer screen from scratches.
You cannot remove scratches from the screen. It is glass. If it were a plastic screen, a plastic polish would remove them. I would suggest a screen protector to prevent any more scratches from happening. And possibly a good protective case.
A microfiber cloth will remove light smudges and scratches from your cell phone screen.
It's a cell phone screen. Of course it scratches.
You can try buffing the scratches out, though you can always get a screen cover for your DS.
to fix the everlasting loading screen on the R4 DS, get an earlier version of the software. I found a file called English-1.12 which when loaded fixes the loading problem.
sand paper
no
The Pelican PSP Screen Protector is a good one.
Yes, if it is hit hard enough, it can break. Screen protectors mainly protect the screen from scratches.
When display settings are making the screen unreadable.
you reformat it