Before washing your weighted blanket, be sure to check the manufacturer's care instructions, which may be found on the tag. That’ll tell you if your weighted blanket is machine washable or not. If you can’t just throw it into the wash, you may need to spot clean it. If there is a dirty spot, simply spot clean it by using a mild soap, or gentle detergent, then rinse them with lukewarm water.  The sooner you deal with stains, the better your chances are of preventing them from setting in. After the wash, you can air dry it (recommended) or a machine tumble-dry, if applicable.