Sony PlayStation 2 (Play Station) Slim DVD Repair (PS2 PSX) Scratched Discs (Cleaning Scratched CD) - YouTube
How to clean your PS2 lens - YouTube
I have an old PS2 that I tried cleaning out the dust and now the disc laser is having trouble reading my ps2 games but can read my ps1 games just fine.
If your PS2 fat reads blue and black discs, but won't read or is slow to read DVDs...and cleaning laser doesn't work.....DONT buy a new laser. Just do this in small increments