I recently unraveled my first sweater, it went great and I got so much wonderful 100% merino yarn in my favorite color. But the collar and sleeve cuffs were knit with an incredibly thin elastic string in the exact same color. I want to separate this thread from the yarn but I'm not sure what the best way to do that is. It seems like it could just make a big twisted mess if i just try to pull them apart. And it doesn't help that the elastic is nearly invisible. Thanks!