<human>:  How do I remove coffee stains from a silk shirt?
<bot>: To remove coffee stains from a silk shirt, start by using a mild detergent to pre-treat the stain, making sure to use a mild, non-bleach detergent. Soak the shirt in cold or lukewarm water and allow the detergent to penetrate the fabric. Use a soft bristled brush or sponge to work the detergent into the fabric, being careful not to brush too harshly. Rinse the shirt in cold water and repeat the process if necessary. Finally, air-dry the shirt or use a low heat setting on your clothes dryer.