Wave spray and saltwater can leave stubborn stains and residue on outdoor fabric, but with the right approach, you can restore its freshness. Start by rinsing the fabric with fresh water to remove loose salt particles. Mix a solution of mild detergent and warm water, then gently scrub the affected areas with a soft brush. For tougher stains, a mixture of white vinegar and water (1:1 ratio) can help break down salt deposits. Rinse thoroughly and allow the fabric to air dry. Avoid harsh chemicals, as they may damage the material. Regular maintenance, such as brushing off debris and rinsing periodically, can prevent buildup and prolong the fabric's lifespan. For best results, always check the manufacturer's care instructions before cleaning.