<human>:  I have a stain on my dress shirt that I need to clean. Can you suggest a good cleaning method?
<bot>: The best method of cleaning a stain off a dress shirt is to use a mixture of warm water and a mild liquid detergent. Dip a soft cloth or brush into the mixture and gently scrub the stain. Rinse off the stain with cold water, and then launder the shirt as usual.