Yes! The same principle applies to all natural products: They are antibacterial and should only be washed when absolutely necessary. Then use a mild baby shampoo and dampen the horse or goat hair (if possible, do not put the entire brush under water). Massage in the shampoo and wash out the brush completely. After a short drying time it will be like new again. For this purpose we use dark wood for the brushes, which is more resistant to moisture than light wood.