Always wash with same colored clothes if you’re doing your laundry in the machine, make sure your black hats are.

Sweat stains out of hats. Finally, rinse off your hat with cool water. Fill a sink or bucket with cool or warm water. Rinse until all of the soap is gone, slightly squeezing the hat to get excess moisture out.

White vinegar is also great for spot treatment. Wipe away sweat stains with a cloth like a microfiber cloth, damped with water and a little dish soap. Then dip the hat in the soapy solution and allow it to soak for.

Wipe away the powder with a clean cloth to see if the stain has been absorbed. Use a combination of hydrogen peroxide and water. Soak your hat in a cleaning solution of vinegar and water overnight.

Washing a golf hat with the dishwasher is another popular way to remove sweat stains from golf hats and caps. After brushing the hat with a brush, apply some powdered or liquid dishwashing soap. Try not to use a detergent with bleach or a bleach.

Dishwasher and hat washer cage. Every hour or so, stir the water to break up the stains and remove them. Stir the water occasionally to help rid the fabric of stains.

After removing the hat, rinse it thoroughly under running clean water until the water is clear and there. Put a few drops of dish soap in. Spray a stain treatment product like shampoo to loosen sweat and grime.