How do I take care of my Wesomnia Wool Blanket The wool has good properties which means that you do not have to wash it as often. The wool is in itself dirt-repellent, ie. the dirt settles on the surface. This is because the wool contains natural fats. A tip if you want to freshen up the blanket is to air it outdoors. In this way it "purifies" itself. If you have, after all, received a stain, we advise you to only wash with a suitable wool cleaner locally. Try to gently "sponge" directly on the stain. Your Wesomnia wool blanket should not be machine washed.