I wash everything!!! Gently on the jelly rolls and charms in the bathroom sink and everything else gets the washing machine. I have the nylon bags that I put fat quarters and everything else is on its own. I put them in the dryer for 10 minutes on low with the woolie balls and take them out and hang them to finish drying. I also, wash the backing. The batting gets 5 wet wash clothes, spritz water on the batting and put in 6 woolie balls to move things about. Now on that one, I check it every ten minutes and re-arrange the batting - total of 30 minutes on warm dryer. I am always astonished as how much some fabric shrinks. However, on all my qulit labels, it says: Wash: warm/cold & Dry: Low or hang. So hopefully my finished quilts won't shrink.