They make holders for them that go in the dishwasher.
Right.They make holders for them that go in the dishwasher.
Fill sink with water, put on hat, stick head in sink, shake head vigorously till you can't hold your breath anymore, pull head out and repeat a few times. Will be clean and in the shape of your head.
Not to mention that when the cardboard deteriorates, there's nothing for the stitching to hold onto. Sometimes it will start ripping out due to that. Someone once suggested Scotch guarding new stuff to me once, but I've never tried it. I imagine it would work to prevent a lot of the sweat staining problems.The bills on many caps are just cardboard covered with cloth and too much washing will turn it to pulp.