Spit on it, lay it on a very smooth, solid surface (like a bench top), work that spit into the knot, then gently tap away at the knot with a hammer/ rolling pin/ empty glass bottle. Lather, rinse and repeat.
Every couple of minutes try with your fingernails to pull the knot apart.
Also chewing on the knot can achieve the same result
stuntnaz said... The hammer works well did myself the other day . Tap the knot then roll it and tap again line becomes soft after a while then use you nails
nails, what bloke has nails, maybe extra carefull you dont break one