I have used Fels Naptha to get out blood stains. If it's just a little spot, I just wet the fabric a little, rub an old tooth brush on the bar of Fels and then very gently brush using small circles. When I'm done I take a damp cloth to try to wipe away some of the soap, and then blot it dry with a cloth or paper towel. It's really been a lifesaver more than a few times.