For urban outdoor furniture that’s been through a rainy season, I’d treat it like a reset, not just a quick wipe-down. First, put on gloves and move the furniture to a sunny spot if you can. Brush off loose leaves, grit, and any green algae or moss while it’s dry—that keeps the mess from turning into mud. Then rinse with a garden hose.
For most metal, plastic, and painted pieces, use warm water with a few drops of mild dish soap and a soft brush or cloth. Work into joints and crevices, but skip harsh bleach or abrasive pads, especially on powder-coated metal or wood. For mold or mildew, try white vinegar on a hidden spot first, then scrub gently. Don’t mix cleaners, and avoid pressure-washing wicker, chipped paint, or loose joints.
Cushions and fabric need a little more care: check the care tag, brush off debris, and use a diluted mild soap solution if allowed. Rinse thoroughly and let everything dry completely in the sun—prop cushions up so water drains. Once dry, check for rust, loose screws, or peeling finish. Re-oil wood if needed, wax metal only if the manufacturer recommends it, and consider breathable covers for the next wet stretch. Think of it as outdoor furniture maintenance, not just cleaning: the key is thorough drying and a mild approach, because city grime and mildew usually come off with patience rather than strong chemicals.