I like a lingerie bag, or a mesh bag I think started life at a sporting goods store for sweaty clothese post sports practice. It's bigger and the water and soap can still pass through it. It has a draw string; pull the loops of the bunny ear knot all the way through and retie. Again- who wants to unwind anything from the agitator in the washing machine?
We use a bucket full of hot water and pour 2 spoon Radiant washing powder, and soak the nylon rop for 2 hours. And then pull of the rope, use a cotton cloth dipped in a softner and wipe off and air dry the same in the room. That gives me better result. I never exposed it to sunlight. Hope this helps.