My Thoughts On Grime And Detergents Blood stains in clothing need to be removed as soon as possible. Use cold water and wash out the stain. Hot water will set the blood and it will be difficult or impossible to get out. Another way is to use a solution of hydrogen peroxide or cloudy ammonia (one part to eight parts of water). If you have any stain remaining wash in detergent with several drops of ammonia. For removing blood stains in carpets mix raw starch and water into a thick paste, apply it, allow it to dry then brush it off. No more blood stains.