Check the care label first
Brush off loose dirt with a soft brush
Spot test any cleaner on a hidden area
Mix mild detergent with cool water
Dip a soft cloth or toothbrush into the solution
Gently scrub stained areas
Wipe away soap with a clean damp cloth
Use baking soda paste for stubborn stains
Rinse lightly with cool water if the material allows
Reshape the hat with a towel or clean hands
Air dry away from direct sunlight
Repeat if needed once fully dry