Scrub the stains with a mixture of baking soda and water or mild laundry detergent, then rinse and air dry.

To remove sweat stains from white hats, apply a cleaning solution made of warm water and mild detergent or a paste of baking soda. Use a soft-bristled brush to scrub the yellowed areas gently. Allow the treatment to sit for 20 minutes before rinsing with cold water and air drying completely.

Recommended Cleaning Methods

• Baking Soda Paste: Mix four tablespoons of baking soda with one-quarter cup of water to create a thick spread.
• Hydrogen Peroxide: Apply a small amount directly to the stain to help break down body oils and brighten the fabric.
• Mild Detergent: Use a bleach-free liquid soap diluted in warm water for general cleaning and maintenance.

Step-by-Step Instructions

1. Prepare the hat: Check the care label to ensure the material is washable. Testing a small, hidden area for colorfastness is recommended.
2. Apply the solution: Dip a soft toothbrush into your chosen cleaner and scrub the sweatband and stained exterior areas.
3. Soak: Let the hat sit for at least 15 to 30 minutes to allow the cleaning agents to lift the dirt and minerals.
4. Rinse: Use cool water to rinse away all soap or paste residue. Avoid soaking the brim if it is made of cardboard.
5. Dry: Pat the hat with a clean towel to remove excess moisture and reshape it. Place it over a tall container to air dry away from direct sunlight.

Comparison of Cleaning Solutions

Maintenance Tips

To prevent heavy yellowing, rinse the sweatband with plain water after heavy use. Always avoid using a mechanical dryer, as high heat can shrink the hat or damage the structure of the crown and brim. Air drying in a well-ventilated area is the safest way to maintain the shape of a white hat.