what's the least painful way to remove a coffee stain?

blot up what you can, then flush it from the back of the fabric with cold water. hot water first can set it. work in a bit of dish soap or laundry liquid, leave it 5 min, rinse. old stain that's already set, soak it in oxygen bleach overnight. like most stains, keep it out of the dryer until it's actually gone.