I assume you are only doing this to your boar brushes? I don't believe badger hair need to split the way boar can. But, as JTB said, since you have three anyway, there is plenty of time for one to dry naturally while you rotate through the other two. This might not be damaging the knots, but at the very least it is an unnecessary risk with no clear gains.
Originally Posted by jtb
Edit: Oh wait, I get it. Yes, you are right, you don't have enough brushes to allow them to dry out naturally between shaves. You need to buy more shaving brushes
-- Sal -- Razors don't shave people. People shave people!
There are 3 critical types of life moments: Times when we should be enamoured of the finer details, and times we should ignore the minutia.