This is a quick, very cheap, and easy way to clean your shaving brushes that have been used, or to remove the stink from a brand new brush. I tend to do mine every 3-6 months depending on use but never less than once a year. You would be shocked at the amount of soap/cream remains even with a proper rinsing of the brush after shaving. One "bath" like this will be good enough to clean a knot completely. If you're de-stinking a new brush it may take several baths before the smell really gets going, however it will also assist breaking in your boar/horse brushes in between your latherings. Keeping up with a semi-annual regimen like this can extend the life of your brushes quite a bit, as there's far less likelihood of any random mildew or mold setting in at the base of the knot. Caveat Be careful using this process with vintage brushes - they may not have been cared for properly and if they're already damaged you can cause hair loss in them. I've used this on numerous new(er) brushes without any issues except for a hair or two coming loose, which is obviously average shedding after a good cleaning anyway. If you have serious hair loss from your brush you may have to consider a defective knot, or something deeper such as mold/mildew already existing in it. What you'll need 2 cups Teaspoon Borax Toothbrush (Not one you use!) Shaving Brushes (Obviously) Water Step One Place some borax into one of the empty cups, this just makes it easier to spoon it into the other cup, particularly if you're doing more than one brush. Take a heaping teaspoon and dump it into the other empty cup, and fill with approximately 1 cup of warm water. Step Two Set your brush into the cup of borax solution and let soak for at least 5 minutes, just like you were going to use it to lather up. Step Three Agitate your brush, side to side and up and down motions working the solution throughout the knot. I generally go through the following rotation: Soak for 5 minutes, Agitate, Soak for 5 more...and will repeat this for about half an hour total. You can see how much I'm mashing the bristles into the solution as well. Step Four Remove from the water thoroughly rinse the knot out. Do not be gentle with this step as you need to get the whole solution out of there. This would be a good time to dump and replace the mixture as well, if you're doing more brushes. Do not re-use the solution as it's full of undesirable things right now and you don't want that in a different brush you're attempting to clean. Step Five Shake brush out thoroughly, make lather motions on a towel which will help get rid of the bulk of excess water. Step Six Place your brush(es) somewhere with air flow that will allow them to dry naturally. Don't place in an enclosed medicine cabinet, etc as that will just defeat the purpose of this whole cleaning. There are of course, a number of ways to clean and de-stink brushes however I found this to be an easy, relatively quick way to take care of it, and don't like using any shampoo/conditioner methods. Hopefully some of you have found this helpful and will be able to keep your brushes going for a good number of decades!