Step 1 : Mix half a teaspoon of an enzyme detergent with one cup of warm water. Apply it to the stain and leave for 5-10 minutes for best results. Rinse with warm water. You may have to rinse it several times to completely remove the residues.

Step 2 : Mix two tablespoons of household ammonia in one cup of water. Apply it to the stain and leave it for less than a minute. Blot using soft, absorbent, white material such as paper towel or napkin.