It is important to keep makeup brushes clean to avoid skin disorders.
But you need to take extra care to wash them as the bristles are very delicate. The tip of the brush may flip out or get tangled after washing them with water. If you dry them that way, the bristles may split up, or may no longer function.
To prevent such issues, I would like to recommend "Fude Gushi (Comb for Brush)."It is a special comb for washing makeup brushes, which is also used by craftsmen in Kumano.

- How to use
Wash your makeup brush with warm water and comb the bristles gently from the root to the tip while the bristles are wet. Do not stick the comb into the bristles at 90 degrees as it will damage the bristles such as breaking off the hair. Make sure to tilt the comb to approximately 60 degrees.
Then, groom the tip of hair gently with your fingers and hang the brush vertically with its bristles facing down. Do not leave the wet brush laying horizontally.

Note:
*Do not use this comb for brand-new brushes with firm bristles or dry bristles.
*Do not use for your hair.
*Do not use for brushes with color dyed bristles.