The heat can cause the hat to shrink or warp, and the strong detergents can lead to discoloration or damage to the fabric.
Best way to wash a hat
A better method for cleaning your hat is to hand wash it using a gentle detergent or specialized hat cleaning solution. Follow these steps to clean your hat:
Fill a sink or basin with cool or lukewarm water and add a small amount of gentle detergent.
Place the hat in the water and gently agitate it to work the soapy water through the fabric.
Use a soft brush or cloth to gently scrub the hat, focusing on any stained or dirty areas.
Rinse the hat thoroughly under running water to remove all soap residue.
Gently squeeze out excess water, being careful not to twist or wring the hat, as this can cause it to lose its shape.
Lastly, reshape the hat and allow it to air dry on a clean towel, away from direct sunlight or heat sources.