Stains on clothes never wash away with the detergent. You have to experiment and implement by yourself to get rid of them
Start with the gentlest treatments and work up from there. Some fabrics won’t take stronger treatments, so be sure to consult the label before trying to treat a stain. Don’t forget to test for color fastness if the garment looks like it might fade.
With the right formula you can remove almost any kind of stain from clothing, and there's no reason not to experiment with ingredients that "do no harm" — in alphabetical order, baking soda, cornstarch, flour, lemon juice, liquid detergent, a raw potato, shampoo, and white vinegar. Follow stain treatments with a regular wash.