<human>:  How can I remove a coffee stain from my shirt?
<bot>: The best way to remove a coffee stain from a shirt is to dab the stain with a cloth or sponge soaked in cold water. Then apply a small amount of laundry detergent directly to the stain and work it in with a soft brush or your fingers. Rinse the area with cold water and repeat until the stain is gone. If the stain remains, try soaking the shirt in cold water and laundry detergent for several hours before washing as normal.