Sugru, the moldable silicone that can repair cables and clean up rusty faucet grips, has found itself another niche as earbud reviver. DIYer Spode writes about how he fixed an almost-dead pair of earbuds with a bit of know-how and some Sugru.
While you could just buy a new pair of earbuds, Spode wasn't about to let his $300+ Shures just rot in a garbage can without an attempt to fix them. So, when the right earbud became finicky, he took them apart, re-soldered the wires together, and created an entirely new casing for each earbud with the moldable silicone. It's a bit more than just your mold-and-fix job, but for reviving a pair of expensive headphones, it's definitely worth the work. Hit the link to see how it was done.