A friend of mine told me that he puts his styrobator in the dishwasher to get it good and clean. I was quite weary of it at first, but I didn't want to spend the time to scrub it. So I threw it in the dishwasher on the bottom rack, on a light wash with some detergent. Below is the results. (It had never been washed previously in four years... I know, bad boy... sue me!) Next time I am going to put it on a full cycle to get it EXTRA white! Dirty... Clean... Have you ever seen anything more beautiful???