Read on English Shaving Bruch Co to use Borax soap in a paste to clean a brush. I did it, it seems to have worked, but wondered if you know of other ways to remove any residue without damaging the brush, hair or knot?
emily's brush cleaning routine is really first rate. i use it on all my brushes and it works brilliantly. i can also say that using apple cider vinegar in place of the traditional white vinegar is a winner also.
http://www.shaveinfo.com/videos/brush_cleaning.htm