How do I get glass out of my computer?

A CD shattered in my computer while my brother was on. He thought he got rid of all of the glass, but I guess not. I bought a new disk. I put it in, and it wouldn’t load. When I opened it, there was a big scratch in it. I tryed it with another usless disk, same thing. I don’t know how to get the glass out. What do I do?