I was watching a disc today and it started to have small pixelization problems. When I backed it up and watched the scene again, it was no longer there. Then about five minutes later it started again. It got so bad that I couldn't watch it anymore. I checked the disc and it was perfectly clean. No cloudy surface either. I was watching on my Toshiba SD-2109, which is almost three years old. I tried playing the disc on my computer, it played fine. So is it a hardware problem? Or do you think the disc is defective?