This confirms some results I have seen from someone who is experimentating with ageing and stability tests. (also it fits older data done by some european magazines !)
70 degrees Fahrenheit I pressume. In case of Kelvin (to low) or Celsius (to high) then it's probally the temperature that killed them.
Best readers for bad burned DVD recordables are the Pioneer dvd-burners. However in your case there's a good change the Pioneer's can not read it.
2 Things could be screwed up. THe dye itself has gone bad.
The silver layer has reacted.
In the last case your as good as doomed.
It's not something like that pits size has been screwed up for which pioneer is very tollerant. Now it's probally the pits and lands that are completely ruined.
Also notice that it has been reported befor that cheap cd wallets most times have the problems of leaching of corrosive chemicals. Still this last one is also possible with jewel cases. So to recommend jewelcases over cd wallets is a questionable thing. Now befor mass hysteria will arrise. Notice that the influence of these chemicals are only possible if the media is poor manufactured.
One thing I like to know Is there a colour change on the burning side of the media ?