<human>:  What is the best way to remove a stubborn stain from fabric?
<bot>: The best way to remove a stubborn stain from fabric is to first pretreat the area with a stain remover, like a laundry pre-treater, or a soft cloth or brush and a mixture of water and detergent. Once the pretreating is complete, use a machine washer to wash the fabric in hot water. Sometimes adding white vinegar to the wash cycle can help remove the stain. If the stain doesn't come out in the wash, then you may need to use a stronger stain remover such as a bleach or oxygen-based cleaner. Be sure to follow the instructions carefully, and test on a hidden area of fabric first.