I've been reading/searching through the forums but haven't seen my particular issue mentioned. Recently, while quality scanning some old media, I was shocked to discover that an alarming percentage of my burned DVD disks (all high quality media) had incredibly high PIE/PIFs. Disk after disk displayed the same scan results, regardless of brand. Also, I noticed that the scans generally seemed to yield high PIE/PIF after hitting the 3GB mark.
I inspected one disk closely and noticed a strange dot/smudge pattern in a very regular patterned distribution on the read side of the disk. Then, I realized that ALL my disks (in that particular CD folder) had the same pattern. Finally, I recognized that the pattern matched up perfectly to a small, curved plastic lip/tab that protruded down about 1 inch behind every disk placed in that particular folder. The lip was made out of the same transparent, finely-"dotted/bumpy" plastic that forms the pouches that holds all the disks in (from the printed side). Thus, 95% of the read side of the disk would be touching a cloth-like material (that left no mark) but on every disk, there was an ugly, parabolic-shaped area where the plastic lip seemed to have "melted" or "rotted" the read side of the disk. I tried cleaning a number of the disks but I cannot seem to get the strange blocthy/dots off. It is as if the plastic from the CD/DVD folder has actually reacted chemically with the read surface of each disk!
I am almost certain that the disks are actually fine and that I only need get rid of the strange "blotchiness" but try as I might, I can't seem to get it off. If in fact it is a chemical reaction, I suppose it might not be able to be taken off. I can try to take a photo or two but I'm not sure if the effect will be visible (I had to look quite closely to even notice it). In any case, I'm thinking that someone on here will have run into this before and will likely know what is going on from my description alone...
I've now got 100+ disks that exhibit this issue and I am quite worried about it. These are disks that were all next to flawless burns that now (superficially) get "0" scores with a Nero quality scan. Any insight/info/recommendations would be much appreciated!