I was cleaning up my room when i found a box with old stuff, around 3 year old. I found my old earphones inside; the wires have become really sticky with parts of it "melted".
I did some research and found this which says to keep it in a cool and dry place, but said container (airtight) was, in fact, kept in a cool and dry place, with dehumidifier packets inside.
I'm concerned since I plan to buy a daily-driver earphone and keep a backup earphone stored away.
How can I store rubber for the long-term? Specifically, rubber wires found on earphones (or just earphones in general)?
I'm not sure whether this is the right SE for the question.