Thursday, while picking up appliance parts, I stupidly managed to hit myself with a Sharpie and put a little swoosh mark on the front of my shirt. To remove it, I started with Goof Off Paint Splatter Remover with part of a wash cloth under the mark and the rest of it above to rub the mark. Several applications of the solvent lightened the stain. Then I applied Persil Pro Clean twice to the stain and rubbed it the same way and it disappeared. So, if you make a clumsy move with a Sharpie, this is how you can fix it.