It is recommended that boiled wool be washed by hand or only in washers that have a wool cycle, and both types of washing should include a wool-specific detergent. Because boiled wool contains natural oil and lanolin, it should be washed sparingly and according to the manufacturer's care instructions.
Shaking or brushing boiled wool garments typically serves for cleaning small, daily debris. Common odors can normally be removed by hanging the garment near a hot shower or outside overnight, which also helps remove wrinkles. Boiled wool is made from wool that has been exposed to high heat and water that shrinks the fabric, this increases its durability and water protection and felts the fabric.