I got a sample of "Soak" no-rinse soap for knitted items with my latest Woolgirl order (and also a pen--woot woot for freebies!) I tried it on Mikey's bloody nose pirate sweater, and wow! It got all the blood out with no scrubbing or anything. All I had to do was SOAK it (guess that's why they named it that ;-) for 15 minutes in cool water. Came out beautifully and you don't even have to rinse it out.
I am going to have to spring for the full size bottle!