There are two ways to play an old, scratched DVD with fidelity. You could buy a better DVD player, one with a more powerful laser that could reveal the data under the scratches. Or you could polish the disc to expose the information again, making the DVD as good as new. I’ve heard that a rag with toothpaste on it works just fine. Restoring youth in an organism is never going to be as simple as polishing a disk with toothpaste, but the first approach, putting a scratched DVD into a new player, was.
So a powerful laser
