I have a couple of lazy tongues, that go back so slowly that the note won't
repeat. The cause of this laziness is not the bristle. So, what can I do to
improve the repetition? If I take the jack out and move the tongue back and
forth for a minute or so, it behaves better, but only for a very short
time. The tongue can't be removed easily from the jack, since the pin
doesn't go all the way through.