1. Turn the hat upside down with a plastic material that can hold boiling water (good heat conduction), preferably hanging it. Just put someone with hot water in 10 minutes. Remember not to put it away immediately after recovery. It's best to put it in an unreachable place for one night.

2. Whether you bring a lot of hot steam into the bathroom or put hot water in the basin under the hat in a small space, wrap it in plastic bags to soften the grass of the straw hat, then knead it into the size of the inner ring of the straw hat with newspaper, then knead it into a ball according to the shape of the straw hat, and then let the hat stand in the shade. After a while, the grass dries and the hat takes shape.

3. Soak the straw hat in warm water, let it stand for ten minutes, take it out and open it in the shade to dry. If it is not ideal, use a hair dryer and blow it with a bracket as you like, being careful not to burn it. You can recover.

4. Soak it in warm water for a period of time, and it will feel soft by hand, then clean it and find a balloon to blow to the size of the inner ring of the river straw hat, that is, the balloon can just hold up the straw hat, and the old hat will not fall off, and then take it to the shade to dry, and the hat will return to its original state. It will be stored like this after it is taken away, and it will not be deformed in the future. It is suitable for any hat that is afraid of pressure.