Rub the stain with lemon juice. Old stains should be soaked in natural yogurt and rinsed with milk. Rinse the clothes thoroughly and wash them with an enzyme-containing detergent. White clothes should be washed with an enzyme-containing detergent with bleach.
Do not treat the stain with water. This will only make it more difficult to remove it. Instead, rub the stain with household ammonia (8%). Rinse and wash the clothes at the highest temperature allowed using an enzyme-containing detergent.
Dab the stain carefully with household ammonia (8%). Rinse in cold water.
Dab the stain with a mixture of three parts spirit and one part household ammonia (8%) and dab immediately with cold water.