<human>:  How do I remove coffee stains from a shirt?
<bot>: To remove coffee stains from a shirt, you can try a few methods. Firstly, you can try to blot the stain with a clean cloth or paper towel and dab it with a mixture of water and laundry detergent. Secondly, you can make a paste of baking soda and water and rub it into the stain to help break it down. Finally, you can try soaking the stained area in cold water and then wash with detergent in a washing machine.