Twisted cord and malfunctioning voice+audio on the Kraken v2 Headset

I've had my headset for about a year and half now and I love it, but the long braided cord would always get tangled and I would intermittently have to unplug it, detangle it, and then plug the USB back in. This worked out fine up until last week, but there have gradually been twists/kinks in the cord that don't really come out. Now the audio and/or mic will cut out every 20 minutes or so, but when I adjust the cord a little bit it reconnects for a bit, so I know it's because the cord has become damaged somewhere inside the thread outer layer. My warranty is up and the rest of the headset works fine so I don't want to replace it, but I don't know how to solder in a new cord... any advice?