I have a couple wool blankets. When I do wash them (mainly to freshen) I have a rack DH made for hand washing. I can lay it across my tub (shower enclosure). I have a handheld shower head. I also have a garden bucket with a spout on it. I put a little Woolite into the bucket and add water. Swish it around and pour over the article I'm washing. Just run the bucket back and forth and let sit a few minutes. By doing it in the tub when you rinse you can rinse till the water runs clear. If you choose to do a machine wash I would set it for delicate cycle with intermittent agitation and cold water. You can also put a sheet in the bottom of your tub then put the blanket on it and do same procedure as bucket rinse. Just don't want too much agitation.