SPOT REMOVER ~ Mix one part Dawn dish washing liquid with two parts hydrogen peroxide; pour or spray it directly on the stain, and watch it disappear like MAGIC.
I'm not absolutely sure about how all of them work but I am positively certain about the hydrogen peroxide being used to get blood out.
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Clothes have a lot of potential problems. Popped buttons, fallen hems, running tights, holes, stains, and scuffs. The list goes on and on. Fortunately, this graphic will show you how to fix the most common clothing mishaps.
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Carpet Cleaner 2 cups Hydrogen Peroxide and 1/4 cup baking soda. Right in to a squeeze bottle. Voila! Stain removing magic.
DIY FAN: Dawn Dish Soap and Hydrogen Peroxide Stain Remover