Since the sweatshirt has been washed and dried the stain will be more difficult to get out. Try blotting the stain with a cloth soaked in white vinegar/water mix (tblsp vinegar/qt water). Then sprinkle a little baking soda on the stain, dampen a clean cloth and rub in the baking soda. Now wash the shirt per the label direction. Before drying again, if the stain isn't gone, try using a cloth dampened with hydrogen peroxide, blotting the stain...be careful though and try on an inconspicuous area of the shirt first.
If all else fails, replace the sweatshirt
..... with instructions that any future staining needs to be brought to your attention before the item is washed.
