Coffee stains? Use spinach water
Coffee stains are one of the most stubborn stains in the world. Removing coffee stains from clothing and carpets is downright impossible, unless you have the upper-body strength to scrub the area vigorously with a toothbrush. To make things easier, just do what the Japanese do.
Some people blend up spinach in water, take the water, and dab it on the coffee stain. Then, using a toothbrush, they scrub at the area until the dark stains have faded and disappeared. Make sure you don’t use any of the spinach pulp, otherwise, you’ll have an unsightly green mark on your shirt or carpet.