<human>:  What is a good way to get rid of a grass stain?
<bot>: A good way to get rid of a grass stain is to soak it in a mixture of detergent and cold water for 30 minutes, then scrub gently with a brush and rinse. If the stain is particularly stubborn, you can try using a mixture of vinegar and baking soda or use a laundry stain remover.