Scrape off all that you can into the trash can. If your washing machine is large enough you can throw it in there. If not, take it to a laundromat with ‘commercial size’ washers. It can be washed in warm water, on the gentle cycle. Put the soap in and let the washer fill up about half-way before adding the comforter, so the soap is mixed in. Then dry it on low heat (it will take a while). I always lay mine over a couple of kitchen chairs to air dry for a while after that.