What I'm not looking for is a razor, something that removes tangled or pilled fiber, rather something that untangles the fibers, creating loft.

The only thing I can think of is something like my friends way, way back in high school had to increase the volume of their afros and that was called a pick.

Would a small version of that unknot the polyester fibers, create loft and restore insulation, or again, am I just dreaming?