Make sure the water level is low and HOT, put in one pair of old jeans, and small amount of detergent..I use a capful of wool wash, and let it go for 5-10 min. Restart if you have to. You don't have to go through the entire cycle till your down. I also put my items in a lingerie bag.
Some yarns take longer than others, too. Is it made from 100% wool and not superwash wool?