This product works effectively on stubborn oil stains on dress shirt collars and cuffs, work clothes for auto mechanics, and more!! It also works great on mud stains on sneakers, practice wear and socks for sports clubs, black marks on indoor shoes, lipstick, oil stains on aprons, fruit juice, blood, and protein stains. It's stick-shaped, easy to grip, and convenient to use, and it removes stains well, so I highly recommend it. It feels good to have things come out clean, doesn't it? Everyone, please try it and enjoy fresh, clean laundry!