To remove this stain, mix the following spot remover(s) and then follow the process below.
Ammonia Solution: One tablespoon clear ammonia to one-half cup water.
Dish Detergent Solution: One teaspoon mild dish detergent to one cup water.
1. Apply warm water or soda water and blot.
2. Apply dish detergent solution and blot.
3. Apply ammonia solution and blot again.
4. Rinse with tap water and blot dry.