how do the rest of you clean hats?

baseball caps: hand wash in cool water with a bit of mild detergent, soft toothbrush on the sweatband (that's where the grime is), rinse, then dry it over a bowl or a ball so it keeps its shape. no dryer, no hot water. check the brim first on an old cap - some older ones have cardboard inside and soaking ruins them, so spot clean those. wool and felt hats, just a brush and a damp cloth.