Pick the stain type and get a step-by-step method to remove it.
Blot with cold water. Pretreat with liquid detergent + white vinegar. Wash in hottest safe water. Don't use bar soap (sets stain).
Tip: Always test on an inconspicuous area first. Check the care label. Don't put a stained item in the dryer until the stain is gone — heat sets stains.