Urban outdoor furniture constantly battles the elements, making mildew and moss common issues that can damage surfaces and create health concerns. Fortunately, removing these organic growths is straightforward with proper techniques. For light mildew, create a solution of equal parts white vinegar and water in a spray bottle. Apply generously to affected areas and let sit for 15 minutes before scrubbing with a stiff bristle brush. For stubborn moss or heavier mildew, mix one cup of bleach with one gallon of water and add a squirt of mild dish soap to help the solution adhere to surfaces. Always test cleaning solutions on inconspicuous areas first and wear protective gloves and eyewear.
For environmentally conscious cleaning, substitute oxygenated bleach for chlorine bleach or use a concentrated soap-based cleaner specifically designed for outdoor surfaces. After treatment, rinse thoroughly with a garden hose or pressure washer on low setting. Prevent future growth by storing furniture indoors during wet seasons, using protective covers, and applying water-repellent sealants to wooden surfaces. Regular cleaning with mild soapy water every month during peak use seasons will minimize recurrence. For wrought iron or metal furniture, immediately dry any moisture accumulation and touch up paint chips to prevent rust formation that can trap organic matter.