Caps are bound to get sweaty and dirty, but if you put it in the washing machine, they’re sure to end up in a misshaped mess.
To clean the dirt and sweaty stains off without damaging the rim, you need a sturdy plastic food container with a lid.
Dry or liquid laundry detergent
Hand held cleaning brush
Large plastic food container (to fit hat)
Balloon/Ball size of inside cap
1. Place the dirty hat in the plastic container with a spoonful of dry detergent and enough warm water to cover the hat about half way.
2. Place the lid on the container, making sure the seal is tight, and shake it vigorously.
3. Open the lid. Scrub the brush over the heavier soiled spots. Remove the water. Repeat the process until water shakes out clean.
4. Remove hat, and place it on the balloon or ball to match a head size.