Originally Posted by
Brontosaurus
If I understand your comments correctly, you are setting the brush on bathroom window sill to dry. Then, once it is dry, you are "fanning" (causing the bristles to splay out?) against your hand before setting it on the shelf.
Were it not for your apparent success after not "fanning" the bristles, I would be inclined to think that a problem might be that you are placing the brush to dry on the bathroom shelf with still a bit too much water in the knot.
My own method, which works for me, is rinse the brush off, dip it in the container of water I use for soaking purposes one or two times, then gently squeeze the standing water from the knot, followed by shaking the knot to free it of standing droplets. And finally, before setting it on a shelf to dry in a dry area outside the bathroom, I gently wipe the tips of the brush on a towel. This has the beneficial benefit of separating the bristles a little as an aide in drying. Never had a real problem with bristle loss since doing this, and as the knot is still damp at this stage, wiping the tips is pretty much the same thing that is being done while shaving.