First, I realized in the Fall of 2005 with the help of this forum. I had 2 year old TDK disc go bad on me.
Next, i ordered some Maxell from buy.com that would be unreadable within two months. I later discovered that i received the 50-spindle of notorious Ritek G05 instead of TYG01 that Maxell had used earlier that year.
After that i replaced all my non-TY media Taiyo Yuden TYG03 or TYG02.
About the same time as you, oddly enough. But replace “TDK disc” with “Datawrite Yellow (RITEK G05) discS”
Verbatim or TY from then on for me, although for plain “everyday use”, i.e. stuff that wasn’t important, or that I had backed up elsewhere, I have still been known to use brands other than TY/Verbatim
CDs, can’t remember, my brain doesn’t work that well at just after 8:30am!
EDIT: If it hadn’t been for CDF, I wouldn’t have had a clue about replacing the discs, reburning them, or what brands to use