Make sure to clean our Moustache & Beard Brush or Old Military Style brush every month with a small amount of soap, warm water and allow to bristles to dry a towel. Not only will this help to ensure that you're not reintroducing any dirt and debris that could be trapped in your brush back into your beard and also remove hair build up but also help soften the bristles slightly.
-Sheldon Marcelle, Proraso Maestro Barbiere and Lead Educator