i bought some more last night, ill try to set up a camera to show how i straighten it.  
basically, i take the long piece, look for the straightest section with the least amount of nodes.  then ill check the sections that need straightening.  
i spin that section so that the bend comes to me then away, like forward and back, then i straighten from right to left, using a cloth.  ive found that its usually just bent right by the nodes, so you can do that first.  then i straighten the nodes.  thats basically it.  ill still try to make a video of it.