I use Tilex, but is has bleach in it so make sure your fabric is color safe! I just spray on spread evenly with a cloth. Let sit for a while then spray off with a hose. Linking other popular choices as well, including several that don’t have bleach ❤️ Patio cushion cleaner outdoor furniture mold and mildew stain remover LTKhome LTKswim LTKFind