I know what this is.
First, the disc is not cloudy. And there's nothing in the dye, or even in the polycarbonate. The disc has not aged or died in any way.
So what is it, you ask?
There's a fine chemical mist on the bottom (and thus tops) or the discs. What it is, where it comes from, and when it happened is what we have to piece together. You might be innocent, but the odd are against you.
I analyzed the disc, and saw immediately that it had micro-abrasions. Some circular, some not, and it's hard to say what may have been caused by shipping from you to me, as they were not 100% secure on the spindle in transit. I analyzed the discs under two magnifying glasses of varying powers, and felt the discs. I saw fine specks/dots, and it felt slightly sticky to the touch.
I ran the disc under water in the sink, then scrubbed it. No change.
Then I ran the water, and held the disc under the water while scrubbing with a dish rag. Almost all of the specks came off. I added some nasty scratches, of course, but the "cloudy" part went away. It appears to be some sort of water-soluble glue.
Have you ever applied one of those spray coatings to inkjet discs?
Or have you ever stored other discs in the spindle? Possibly the aforementioned inkjet discs?
Something we've never really talked about is those coatings, and how the can damage drives and other items in an enclosed environment. It's possible, for example, for still-wet (even minutely!) spray-coated inkjet discs to have the spray evaporate inside an enclosed spindle, and the glue to settled. This spindle has an evaporate pattern to the glue droplets.
So we know what, but not when it happened.
If it was "fine" at an earlier time, you did it somehow. This is unfortunately one of this biggest issues when it comes to media degradation issues -- faulty memory.
If it was not fine earlier, then it may have been contaminated at the plant where the Memorex discs had the label applied, given how it's on both coated sides. Either the discs were hit by a spray on the side, or something pooled somewhere. And the pooling evaporated on the trip from Asia to your house.
It had to happen when the discs were on the spindle, as none of the hubs show issues. Those are clean.
Not what you wanted to hear, I'm sure, but that's what it was.
Yes, the discs are useless as is. Trying to clean them manually would scratch them, too. And using a resurfacing machine would not be worth the cost. Just throw it away, and buy more.
I've only seen one case of degraded media in the past 13 years, with no other possible explanation.