How do you remove an eyeliner stain from clothing when you have already washed it?

To remove an eyeliner stain from clothing that has already been washed, first, gently scrape off any excess residue with a dull knife or spoon. Then, apply a stain remover or a mixture of dish soap and water directly to the stain, letting it sit for about 15 minutes. Rinse the area with cold water, and if necessary, repeat the process before washing the garment again. Avoid using hot water, as it can set the stain.