1, add a little washing powder to the basin, then pour a proper amount of warm water and stir with a brush to dissolve it.

2. Pull off the cap button and soak it in water for about 10 minute.

3. Take out the hat, put it on the clean washstand and tidy it up a little.

4. Brush the inside of the hat from the inside out with a brush.

5. Brush the outside of the hat from back to front.

6. Brush the front and back of the brim clean.

7. Put the hat into the basin and brush it roughly, then rinse it and dry it.