Unless you have an illness, it's most likely you.
I'm not worries about the plastic part of a DVD at all but the metallic layer will last you 10-20 years if stored away from any UV
I'm not worries about the plastic part of a DVD at all but the metallic layer will last you 10-20 years if stored away from any UV
Laser rot is kind of a non-issue: it's generally down to manufacturing defects.