Search:

You will be surprised at the crud that comes up. Even a new knot will yield a pile! Spend some time rinsing.
Also, on old knots, an o-ring slid up over the handle and onto the hairs at the...

Yes, definitely a horsey! Chuck it upside down in a coffee cup of water with a tablespoon of Oxyclean and let it fizzle.
Use it! I have a horsehair brush and really like it!