Blending brushes

I have a number of these, mainly because they only work well for soft blending of the paint before they get too saturated with paint. And that doesn't take very long. It is possible to wipe the brush, basically after every stroke, to keep the tips of the bristle soft, but eventually they clump together anyway. Then the brush needs to be cleaned- in turpentine- and left to dry out. That takes overnight. In the meantime it is useful to have extras handy!