<human>:  What's the best way to remove an oil stain from a shirt?
<bot>: The best way to remove an oil stain from a shirt is to first blot the stain with a paper towel to absorb as much of the oil as possible. Then mix one part dishwashing liquid with two parts warm water and apply it directly to the stain. Gently rub the solution into the stain using a soft cloth and leave for about five minutes. Finally, rinse the shirt with cold water and repeat the process if necessary.