After noticing what seemed like a bit too much lint, dog and cat hair, etc on a feww of my kilts I dared the first washing. Probably read this here somewhere, but filled the tub with cold water and a mild detergent, then carefully added the three kilts out full length. After an hour of soaking, I was amazed to see how much soiling had been removed. Honestly had no idea that something that drapes like a kilt, especially with no rough wearing, could have possibly picked up so much. Then I carefully lifted each while paying attention to preserve the pleating and hung them to drain. After draining, I repeated the tub soak with clear water to thoroughly remove any residual detergent. Two were canvas and one a polyester blend. Lastly, I again hung each one suspended full length and width, adjusted the pleats, then air dried. I wouldn't have dared the dryer.
When finished, they looked like new! Thanks to whoever planted the seed for this technique. Best of all, with air drying and a little attention to the pleats when hanging, they need very little touch-up ironing!