This looks like a RiTEK serial number, which means that the disc is probably not a POS.

What I'm suspecting is that if you are leaving these discs in the car, then the large temeperature changes between night and day are causing the disc to prematurely age. Even with 'good' media, poor storage conditions are definitely a factor.

What I suggest is that you try to keep one or two discs indoors except when you drive, and see how they last.