Check the care label first
Remove loose dirt with a soft brush
Spot test any cleaner on a hidden area
Fill a basin with cool water and mild detergent
Gently scrub stained areas with a soft cloth or brush
Rinse with cool water until soap is gone
Press out excess water with a towel
Reshape the hat while damp
Air dry away from direct heat and sunlight
Avoid machine washing unless the label says it is safe
Avoid the dryer
Clean the sweatband regularly
Store the hat in a cool, dry place