After shaving, simply rinse your Bevel Brush in hot water until all lather is removed. Do one final rinse in cold water. For occasional deep cleaning, a gentle shampoo will suffice. If you think hard water is causing buildup on the bristles (preventing proper water absorption), add 1 tsp of Borax to 1 cup of water. Stir the brush several times over a 30 minute soak and rinse thoroughly.