Key lime pie stains on outdoor furniture cushions can be stubborn, but with the right approach, they can be effectively removed. Start by gently scraping off any excess pie filling with a dull knife or spoon. Avoid rubbing, as this can push the stain deeper into the fabric.

Next, mix a solution of mild dish soap and warm water. Dip a soft cloth or sponge into the mixture and dab the stain, working from the outside inward to prevent spreading. For tougher stains, a paste of baking soda and water can be applied and left for 15 minutes before rinsing.

If the stain persists, try using a vinegar-water solution (1:1 ratio) or a specialized upholstery cleaner suitable for outdoor fabrics. Always test any cleaner on an inconspicuous area first. Rinse thoroughly with clean water and allow the cushion to air dry completely before use.

Prevent future stains by treating cushions with a fabric protector and cleaning spills promptly. Regular maintenance will keep your outdoor furniture looking fresh and stain-free.