I recently bought a used ps2 slim and it reads discs great, but it makes really loud noises while reading discs. The noises only happen when the laser is moving. It makes a pretty loud whirring sound, like an old printer. The warranty is already voided and I'm not afraid to open 'er up. Anyone got any ideas? Also, some black gunk has accumulated on a spring looking thing inside my ps2 that runs parallel to the laser rails. I'm assuming it's lubricant of some sort, but it looks really fuzzy. I got a little on my finger and it stained it. What is this stuff? Can I safely wash it off? Thanks in advance.