Tea stains on outdoor sofa fabric can be stubborn, but with the right techniques, they can be removed effectively. Start by blotting the stain with a clean cloth to absorb excess liquid. Mix a solution of warm water and mild dish soap, then gently scrub the stain using a soft-bristled brush. For tougher stains, create a paste with baking soda and water, apply it to the stain, and let it sit for 15 minutes before rinsing. White vinegar diluted with water can also help break down the stain. Always test any cleaning solution on a hidden area first to avoid fabric damage. Regular maintenance and quick action will keep your outdoor sofa looking fresh.