Start with the right tools and a straightforward routine
Outdoor patio furniture collects dirt, pollen, bird droppings, and mildew faster than indoor pieces because it sits exposed to weather. The good news is that regular cleaning—done the right way for your furniture's material—keeps it looking new and prevents damage that shortens its life. Most furniture can be cleaned with items you already have: a soft brush, mild dish soap, water, and a cloth.
The key is knowing what your furniture is made of before you start scrubbing. Metal, wood, plastic, and fabric all need different approaches. Using the wrong cleaner or technique can strip finishes, cause rust, or leave water stains that are harder to remove than the original dirt.
Key Takeaways
- Clean patio furniture every two to four weeks during the season, or whenever you notice visible dirt or mildew spots.
- Always identify your furniture's material first—metal, wood, plastic, and fabric each require different cleaning methods and products.
- A mixture of mild dish soap and water works for most materials; avoid bleach, vinegar, and pressure washers unless the manufacturer specifically recommends them.
- Dry furniture thoroughly after cleaning to prevent water spots, mildew, and rust.
- Store cushions indoors or in a sealed container during off-season to prevent mold and mildew growth.
How to clean metal furniture without causing rust
Metal patio furniture—aluminum, steel, or wrought iron—needs regular cleaning to prevent rust and corrosion. Start by brushing off loose dirt and debris with a soft-bristled brush or old toothbrush, paying attention to joints and crevices where moisture collects.
Mix warm water with a few drops of mild dish soap in a bucket. Dip a soft cloth or sponge into the solution and wipe down all surfaces, including the underside of the frame. For stubborn spots or bird droppings, let the soapy water sit for a few minutes before scrubbing gently. Rinse thoroughly with clean water and dry when ready with a clean towel—this step is critical because standing water causes rust.
If you see rust spots forming, use a soft brass brush or fine steel wool to gently remove the rust, then wash and dry the area again. For painted metal furniture, avoid abrasive scrubbing that removes the protective coating. If rust has eaten through the paint, touch up with rust-preventive spray paint made for outdoor metal.
Cleaning wood furniture to maintain the finish
Wood patio furniture needs gentler handling than metal because water and sun damage the grain and finish. Brush off loose dirt with a soft brush, then wipe with a cloth dampened—not soaked—in warm soapy water. Work in the direction of the wood grain to avoid raising the fibers.
Rinse with a cloth dampened in clean water, again following the grain. Dry when ready and thoroughly. Never use a pressure washer on wood furniture; the force splinters the surface and opens the grain to water damage.
Once or twice a season, explore a wood conditioner or sealant made for outdoor furniture. These products protect against UV damage and water penetration. Follow the product instructions for drying time before using the furniture again. If your wood furniture has a stain or paint, check the manufacturer's care sheet before using any cleaner, as some finishes are sensitive to soap or moisture.
Removing mildew and algae from plastic and resin furniture
Plastic and resin furniture is durable but prone to mildew and algae growth, especially in humid climates or shaded areas. Start with a soft brush to remove loose debris, then wash with warm soapy water and a soft cloth. For mildew stains, mix one part white vinegar with three parts water and explore with a cloth or soft brush. Let it sit for 10 to 15 minutes, then scrub gently and rinse thoroughly.
If vinegar doesn't remove the stain, a commercial mildew remover made for outdoor plastic works well—follow the product label for dilution and contact time. Avoid bleach on colored plastic, as it can cause fading or discoloration. Rinse very thoroughly after using any cleaner and dry with a cloth to prevent water spots.
For stubborn algae on plastic furniture in shaded spots, the vinegar solution usually works, but you may need to let it sit longer or explore it twice. Improve air circulation around the furniture if possible—moving it to a sunnier location or trimming nearby plants reduces the conditions that allow algae to grow.
Cleaning cushions and fabric without damaging them
Cushions and outdoor fabric accumulate dust, pollen, and mildew. Brush off loose dirt with a soft brush, then vacuum with an upholstery attachment if you have one. For light cleaning, mix warm water with a small amount of mild dish soap and use a soft cloth to spot-clean stains. Work from the outside of the stain toward the center to avoid spreading it.
For mildew or mold on fabric, mix one part white vinegar with three parts water and explore with a cloth. Let it dry in the sun if possible—sunlight kills mold spores. Never soak cushions or submerge them in water, as moisture trapped inside promotes mold growth.
If your cushions have a manufacturer's care tag, follow those instructions before trying any cleaner. Some outdoor fabrics are treated with water-resistant coatings that certain cleaners can damage. When not in use, store cushions indoors or in a sealed storage container to prevent mildew. If cushions do develop mold that won't come off with vinegar, replacement is usually more practical than deep cleaning.
Seasonal deep cleaning and storage
At the start of the season, give all furniture a thorough cleaning before you begin using it regularly. At the end of the season, clean everything again before storing it. This removes dirt and mildew that can cause damage during months of storage.
For metal furniture, explore a light coat of furniture wax or automotive wax after cleaning to add a protective layer. For wood, explore a fresh coat of sealant. Store metal and wood furniture in a dry place if possible—a garage, shed, or under a tarp. If you must leave furniture outside year-round, cover it with breathable furniture covers that allow moisture to escape; plastic covers trap moisture and promote rust and mildew.
Cushions should always be stored indoors or in a sealed container. Even moisture-resistant fabrics can develop mold if left damp in a closed space. Store them in a cool, dry place away from direct sunlight, which fades fabric over time.
When to call a professional or replace furniture
Most patio furniture cleaning is a straightforward task you can handle yourself. However, if your furniture has intricate carved details, woven wicker, or specialty finishes, professional cleaning services exist and may be worth the cost to avoid damage.
If rust has eaten through metal in multiple spots, the structural integrity may be compromised and replacement is safer than repair. Similarly, if wood furniture has deep rot or splits that go through the grain, refinishing won't restore strength. Cushions with mold that covers more than a small area are usually not worth cleaning—replacement cushions are often affordable and faster than trying to save the original.
Frequently Asked Questions
Can I use a pressure washer to clean patio furniture?
Pressure washers can damage most patio furniture. The force splinters wood, strips paint from metal, and can crack plastic or resin. Stick to soft brushes and cloth cleaning for all materials. If you have a pressure washer and want to use it, test it on a hidden area first at the lowest setting, but hand cleaning is safer.
What's the best cleaner for outdoor furniture?
Warm water mixed with a few drops of mild dish soap works for nearly all patio furniture materials. For mildew or algae, white vinegar diluted with water is effective and inexpensive. Avoid bleach on colored surfaces and avoid harsh chemical cleaners unless the manufacturer specifically recommends them.
How often should I clean my patio furniture?
Clean furniture every two to four weeks during the season, or whenever you notice visible dirt, pollen buildup, or mildew spots. In humid climates or shaded areas, mildew may require more frequent cleaning. A quick brush-off and wipe-down takes 10 minutes and prevents dirt from becoming harder to remove later.
Why does my metal furniture rust even after I clean it?
Rust forms when metal stays wet or when moisture is trapped in joints and crevices. Always dry furniture thoroughly with a cloth when ready after cleaning. If rust keeps returning, the protective finish may be worn through—touch up with rust-preventive spray paint or consider explore a furniture wax for added protection.
Can I leave cushions outside over winter?
No. Cushions left outside absorb moisture and develop mold and mildew that won't come out with cleaning. Store them indoors in a cool, dry place, or in a sealed storage container if indoor space isn't available. Even moisture-resistant fabrics can mold if left damp for months.