To properly care for and clean a shaving bowl or mug, it is recommended to rinse it with warm water after each use to remove any remaining shaving cream or soap. Use a mild soap and a soft cloth to gently clean the bowl and avoid using abrasive materials that could scratch the surface. Allow the bowl to air dry completely before storing it. Periodically, you can also deep clean the bowl by soaking it in a mixture of warm water and mild soap, and gently scrubbing with a soft brush if needed. Proper care and cleaning will help maintain the longevity of the shaving bowl or mug.