Discovering mildew on your outdoor bench cushions can be frustrating, but don't worry—it's a common and solvable problem. First, take the cushions outside to a well-ventilated area and brush off any dry, loose spores. For a natural solution, create a cleaning paste using equal parts white vinegar and baking soda. Apply it directly to the stain, let it sit for 15-20 minutes, then scrub gently with a soft-bristled brush. Rinse thoroughly with a hose and let the cushion dry completely in the sun, which helps kill remaining spores.
For tougher stains, a diluted bleach solution can be effective for light-colored, bleach-safe fabrics. Mix one cup of bleach with a gallon of water. Test on a small, hidden area first. Apply the solution, scrub lightly, and rinse extremely well. Always ensure the cushion is completely dry before placing it back on your bench to prevent mildew from returning. For ongoing prevention, store cushions in a dry place during wet weather and use protective covers. With these simple steps, you can restore your outdoor seating and enjoy a fresh, clean patio space.