Have used both. Now use non-bristle 99 percent of the time. When I do use bristle cleaners it's for the shank only and also saturated with alcohol. Do not know if it's true but have been told the vulcanite stem draft holes get a small polishing when they are made and using the bristle cleaner roughs them up and just makes it a little harder to get them clean. If I thought it was that important I would hunt up the shank brush kit I bought but never used, which I can't remember where I stashed. I'm probably sundowning again but Alzheimers is a gift and I don't want to waste it. It's fun, you get to meet new people every single day. :lol: