First, it is best to use a cap to support the straw hat. When the hat is not worn, put it on the cap to avoid damage to the cap and affect the next time. If you don't wear it for a long time, put a clean cloth or plastic paper on the hat to prevent dust from entering the gap between the paper and grass.
Second, moisture-proof: Before putting on the hat, put the hat up and ventilate for 10 minutes to remove the moisture generated by the human body.
Third, clean: If it is dirty, you can use a clean cotton cloth wrapped around your fingers, gently rub with water, then dry, do not put a plastic bag when wet, in case the grass produces mildew.