Here are the details of your brush - YUKIMU SUPER AUDIO ACCESSORY| Yukimu. The 'secret' to the brush is the Mitsubishi COREBRID™ B bristle which is a hollow acrylic bristle filled with carbon making it anti-static. Other companies such as 2:Anti-Static | Analog Relax and Furutech 圖片 Audio grade IEC connector use the same bristle in their brushes; and they are all expensive. The Furutech literature specifies the following: It is possible to wash the brush, however, take care not to entangle the fibers and do not use detergents or bleaches. RINSE WITH FRESH WATER ONLY. After washing, dry in a shaded, well-ventilated area.
However, unless you have reason to suspect the brush is dirty with oil or grease, no reason to resort to wet cleaning. Brushing across a rod of Teflon should be fine to remove particles. Particle articles will want to adhere to the Teflon (lowest on the Triboelectric scale) and the Teflon will do no harm to the bristle, and about a 3/8-inch to 0.5-inch diameter rod of Teflon is generally quite cheap. Then rinse the Teflon rod with water to remove the particles it picked up and dry.
Take care
Neil