Leave the stain alone if it is moist until the dirt has completely dried.
Brush off excess dirt with a clean toothbrush.
Soak the fabric in white vinegar for approximately 30 minutes.
Remove the fabric from the vinegar and wring it out.
Apply a stain removing spray or stick to the area and let it soak in for 5 minutes.
Launder according to the fabric's directions. If the item is safe for bleaching, add 1/4 cup bleach to the wash.
Check the fabric before drying it to make sure the stain is gone, as drying can set any remaining stains. If you still see a trace of the stain, repeat the previous steps and wash again.