Dip your brush into the soap.
Rub the soap into the bristles using a circular motion. Ideally done on the palm of your hand. Needs to be done carefully.
Once the soap is well worked into the bristles wash your brush with warm running water. If there is a lot of paint on your brush it may take more than one application to clean it.
Remove excess water with a towel and allow brushes to dry.
Allow your brushes to dry on a clean towel or hang to drip dry.