Cleaning hair brushes is a great way to maintain their effectiveness and hygiene. Usually, you can start by removing all the hair from the bristles. Then, soak the brush in warm soapy water for a few minutes to help break down any product build-up. For deeper cleaning, you might use an old toothbrush to scrub between the bristles. How often do you clean your hair brushes? Do you have a favorite cleaning method or product?