There are degrees of birdnesting. Some are easier than others to resolve. I have tried numerous methods to resolve them, but some clients are especially endowed at nesting. I have found for me, the easiest method is to just work the location of the knot gently to resolve.
Capt. Craig Copeland
Licensed by the US Coast Guard
2013 Nautic Star 2110 Shallow Bay Boat
Humminbird HELIX 12 CHIRP MEGA SI GPS G2N
Nautic Star Boats Pro Staff (nauticstarboats.com)
Redneck Fish'n Jigs Pro Staff (redneckfishn.com)