Try using bleach, or one of those tide pens.
Stains are made of chemicals with loose ends. These ends stick to loose ends on what they stain. IN ADDITION:. A stain is a pigment that has to have a surface that will accept it. Meaning that if a...
mix one part ammonia and one part water. apply with a towel and dry with a towel do not over wet the area. repeat until gone
It's simple, because it's a stain.
Lick it off with your tongue; or a friend's tongue.