Pour or dribble plain ammonia over it and then give it a little time to soak in. Rinse well. Works everytime
If your article of clothing is able to take it, get the hand cleaner that the mechanics use (often called Goop, Orange Cleaner..or you can get some even geared towards clothing stain removal if you go to places like Dollar General or Family Dollar). These items cost about a dollar. It has worked wonders for my family's laundry and my husband works at a slaughterhouse.
Hydrogen Peroxide will remove blood. Just pour it on and watch it instantly disappear. Dryed blood might need a little more time to soak.
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