I can tell you how I did it and finish by saying I have to beleve there is a better way .
I used a knife to cut the hair down to flush and then a narrow chisel to dig out the knot. Followed by sanding the glue from the sides and bottom .
While this worked, it was a slow hard way to do it. I'm thinking careful use of a Dremel tool might work. However I would still sand the sides by hand so as not to enlarge or distort the opening.
Just my thoughts,
Ken.
_________________ Ken.
All shaves are good shaves, some are just better than others.
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