Blood usually washes off with warm water and soap. Don't use cold and don't use hot. You may also want to use a scrub brush lightly. For hard to remove stains use cheap hair spray. This is a trick I got from a neighbor who worked at a hospital for removing blood from white sheets and found very successful. Also found successful in removing other stains. Spray on and let it set and then wash with warm water; light scrubbing to aid as necessary.
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