Ink stains on outdoor sofa fabric can be frustrating, but with the right approach, they can be effectively removed. Start by blotting the stain with a clean cloth to absorb excess ink—avoid rubbing, as this can spread the stain. Next, apply a mixture of mild dish soap and warm water, gently dabbing the area. For stubborn stains, use rubbing alcohol or a specialized fabric cleaner, testing it on a hidden spot first. Rinse thoroughly and let the fabric air dry. Regular maintenance and prompt action are key to keeping your outdoor sofa looking pristine.