If necessary, remove loose hair to hand or use a slim comb’s handle to lift the hair out from the bristles.
Wash your wave brush in quality shampoo, but don’t condition it. The use of a conditioner will probably soften the bristles.
Finally, rinse your brush thoroughly in cold water.
Let it dry with the bristles down on sunlight, radiators, hairdryer, and any artificial heat.
Some people use cleansers or warm soapy water instead of shampoo. Never use ammonia or hard cleaning agents for that purpose! Be very careful and soft with natural bristles. And avoid soaking the wooden base in water.