PS2 SCPH-70012 disk read problems?

Okay so I've had my ps2 for a while and it's worked perfectly fine. It worked in March when I went on my trip and I guess my room mate had been playing it while I was gone. She says that she turned it off but when I got back a month later it was on. About two weeks later I tried playing my games in it and now it says that it has a disk read error. It sometimes reads the disk but when I go to load the game the screen goes black and after a moment it will tell me that the disk cannot be read. I tried using a lens cleaning disk in it, but of course it isn't reading properly. Does anyone think that this problem is fixable or am I going to have to get a new ps2?

Kt
May 2009