Well, he didn't teach me everything..
Use a wire brush (stainless steel /paint dept), water or solvent as necessary.. Stroke in the direction of the bristles away from the handle. In the palm of your hand; under water you can clean well with plenty of rinse (no paint in final rinse). Don't dabble the bristles of the brush. Where the bristles, handle and metal (Purdy) meet - make certain it is rinsed.
Eventually I'll toss a brush as they get gunked up.
Sorry if I can't explain this perfectly.....
-- Oren
"Well, it doesn't happen all the time, but when it happens, it happens constantly."