The right way to clean each type of patio furniture. A material-by-material guide.
- Lumina C&O
- 6 days ago
- 7 min read
How to clean wicker, metal, resin, teak, and cushions so nothing gets ruined and everything lasts longer
Summer on a Chicago patio is short and sweet. The last thing you want is to spend it scrubbing off a season's worth of grime because you used the wrong product on the wrong surface. Different materials have different enemies — and what rescues your teak can damage your resin. Here's what actually works, material by material.
Natural & resin wicker
Woven synthetic polyethylene or natural rattan
Modern outdoor wicker is almost always resin, a synthetic polyethylene weave that handles weather far better than the natural rattan of older pieces. Its smooth surface resists staining, but the interlocking weave traps pollen, dirt, and moisture between strands, which is where mold and mildew set up shop.
Routine cleaning:
Use a vacuum with a brush attachment or a soft handheld brush to remove loose debris from between the strands before any water touches the furniture.
Mix a small amount of mild dish soap in a bucket of warm water. Wipe down the weave with a soft cloth or sponge, with the non-abrasive side.
For corners and deep crevices, a soft-bristle toothbrush works well to get into the woven structure without fraying strands.
Rinse with moderate hose pressure. Let furniture air-dry completely in the sun before covering — damp wicker under a cover breeds mildew fast.
For mold or mildew
A 50/50 solution of white vinegar and warm water, scrubbed in with a soft brush, will penetrate the weave and break down mold at the source. Vinegar is a mild acid that kills many species of fungi without damaging the fibers. For visible mold, wear a dust mask and safety glasses, scrub with a toothbrush, rinse clean, and discard your brushes. You don't want spores spreading.
What to avoid
Pressure washers can shred weave
Bleach on colored resin fades finish
Covering while damp
Metal furniture
Aluminum, powder-coated steel, wrought iron, cast iron
Metal outdoor furniture falls into two broad groups: rust-prone (wrought iron, cast iron, uncoated steel) and rust-resistant (aluminum, powder-coated steel). The cleaning approach is similar for both, but rust treatment is where they diverge significantly.
Routine cleaning
Wipe down with a soft cloth and warm soapy water. For aluminum, a gentle wipe is usually all that's needed. It doesn't rust, but it does oxidize and collect grime.
For tough spots, use a soft toothbrush with mild detergent, then rinse with a garden hose.
Dry the furniture thoroughly. Standing moisture is the primary cause of rust on ferrous metals.
Treating rust
Rust is the result of iron reacting with oxygen and moisture. Mild acids break this down. White vinegar (4–6% acetic acid) applied directly to rusted areas, left for several minutes, then scrubbed with a wire brush or steel wool, will dissolve surface rust and reveal the metal beneath. A baking soda and water paste (thickened with hydrogen peroxide for heavy rust) is a gentler option, apply, let sit 20 minutes, then scrub with a mildly abrasive pad. *** Never mix vinegar and Hydrogen peroxide since they will create harmful fumes.
What to avoid
Harsh abrasive scrubbers on powder coat: scratches the finish
Leaving metal wet overnight
Power washers on frames
Resin / HDPE / recycled plastic
High-density polyethylene and marine-grade polymer
Resin and HDPE furniture (brands like POLYWOOD and Trex) are among the easiest outdoor materials to maintain. Made from recycled plastics, they're non-porous, UV-resistant in most formulations, and virtually impervious to moisture. Cleaning is straightforward , but a few missteps can cause fading or surface damage.
Routine cleaning
Rinse with a hose to remove loose dirt and pollen.
Wash with warm water and mild dish soap using a soft cloth or sponge. Avoid abrasive scrubbers.
For stubborn stains on HDPE, a 1,500 PSI pressure washer held 8–12 inches from the surface is acceptable, closer than that and you risk marring the texture.
Rinse thoroughly. No sealant or treatment is necessary for standard resin and HDPE furniture.
For mold or mildew
A vinegar-and-water solution works well to eliminate mold on resin surfaces.
What to avoid
Teak oil: it can stain and damage the finish
Prolonged direct sunlight without UV-resistant coating
Extreme heat sources nearby
Bleach on tinted or darker finishes, as it can strip color
Teak
Tropical hardwood
Teak is genuinely exceptional as an outdoor wood, and the science backs it up. Research published in the Annals of Forest Science (Springer, 2018) links teak's outdoor durability directly to its heartwood density and natural extractive content. Its tight, interlocked cellular structure creates a physically abrasive surface that resists fungi and insects. Its natural oils form a hydrophobic barrier against water penetration and UV degradation. New teak is a warm golden-honey color; left untreated outdoors, it weathers to a silver-gray patina within months.
Routine cleaning
Use mild dish soap diluted in water, or a 50/50 vinegar-and-water solution. Both are safe on teak.
Scrub with the grain using a soft cloth or a soft plastic brush. Scrubbing against the grain raises fibers and roughens the surface.
Rinse clean with water and allow to dry completely.
Between deep cleans, a quick dusting prevents debris from embedding in the grain.
Preserving the golden color
If you want to maintain the teak's original honey tone, apply a teak sealer (not teak oil more on that below) after the surface has been thoroughly cleaned and fully dried. Tung oil, linseed oil, or purpose-made teak sealer should be reapplied every 2–3 months through the outdoor season. If the furniture has already grayed, light fine-grit sanding removes the oxidized surface layer and reveals the original tone beneath, at which point sealer can be applied.
The teak oil problem
Despite being marketed for teak, teak oil is counterproductive for outdoor furniture. It doesn't deeply penetrate dense teak heartwood, it attracts mold spores, and it can leave a sticky surface residue. Industry consensus from multiple outdoor furniture manufacturers points to teak sealer as the correct product outdoors. It repels water and moisture and prevents food and beverage staining without the downsides of oil.
What to avoid
Teak oil outdoors
Metal brushes or steel/brass wool : it damages grain
Pressure washers: it strips natural oils
Scrubbing against the grain
Outdoor cushions & fabric
Sunbrella, solution-dyed acrylic, polyester, and blends
Cushions take the most abuse: direct contact, spills, rain, pollen, and pet fur. Quality outdoor fabrics like Sunbrella are solution-dyed acrylics built to resist UV fading and moisture, but they still need regular cleaning to prevent mold and mildew from establishing in the foam and seams.
Routine cleaning
Brush off loose dirt with a soft brush before any water is applied.
Mix mild dish soap in a bucket of warm water. Scrub with a sponge or soft brush, working it into the fabric.
Rinse thoroughly with clean water. Air-dry completely — standing cushions on their sides allows water to drain through the seams evenly and prevents water-ring stains.
Never cover or stack cushions while damp.
Mold & mildew
Undiluted white vinegar sprayed directly onto affected areas and left to dry is an effective and eco-friendly approach: vinegar's acetic acid kills many common mold species without damaging fabric fibers. For deeper staining, a mix of ¼ cup dish soap, ¼ cup hydrogen peroxide applied to the stain (let sit 20–30 minutes, then rinse) works well on most outdoor fabrics. Always spot-test first, as hydrogen peroxide can lighten some dyes. And never mix vinegar with hydrogen peroxide!!!
Tough stains
Red wine / grass: hydrogen peroxide + baking soda paste, sit 10–15 min
Oil / grease: Dawn dish soap directly on stain
Tree sap: warm hand sanitizer softens it for removal
End-of-season storage
Deep-clean cushions before storing: residual moisture, pollen, or food particles become a mold and pest magnet over winter. Store in a dry, ventilated space or in sealed weather-resistant containers.
What to avoid
Hydrogen peroxide on dark fabrics without spot-testing
Bleach on non-colorfast or patterned fabric
Storing damp
Well-cared-for outdoor furniture can last decades and it really comes down to knowing what each material needs. We put this guide together because we genuinely love helping people get the most out of their spaces. Enjoy your summer days outside and if you have questions about your specific pieces, we're always happy to help!
Love,
Alex
Lumina Cleaning & Organizing
© 2026 Lumina Cleaning and Organizing. All rights reserved. Terms & Conditions
Sources & citations
1Baraloto, C. et al. (2018). "Comparison of teak wood properties according to forest management: short versus long rotation." Annals of Forest Science, Springer Nature. DOI: 10.1007/s13595-018-0716-8 — on teak heartwood density, durability, and extractive content. Peer-reviewed
2Martha, R. et al. (2021). "Effect of furfurylation treatment on technological properties of short rotation teak wood." Journal of Materials Research and Technology, Vol. 12, pp. 1689–1699. — on dimensional stability of teak wood. Peer-reviewed
3Cornell University — iron oxide (Fe₂O₃) chemistry reference cited via House Digest (2024). Rust is the common name for iron oxide, formed when iron contacts oxygen and moisture. Scientific reference
4POLYWOOD. "How to clean outdoor cushions." polywood.com — manufacturer care guidance for solution-dyed acrylic outdoor fabrics, bleach protocols, and fabric-safe cleaning solutions. Manufacturer guide
5Bob Vila. "How to clean patio cushions." bobvila.com — hydrogen peroxide and dish soap stain treatment ratios; spot-testing guidance. Established home improvement
6BBQGuys Outdoor Furniture Care & Cleaning Guide. bbqguys.com — teak cleaning ratios, tung oil and linseed oil for color preservation, resin wicker maintenance. Manufacturer / retailer guide
7Patio Productions. "Teak furniture care & maintenance." patioproductions.com — teak grain-direction scrubbing, gray patina explanation (UV oxidation), teak sealer vs. oil distinction. Specialty retailer guide
8Decor Outdoor. "Patio furniture cleaning & care guide: wicker & plastic." decoroutdoor.com — resin wicker seasonal maintenance checklist, toothbrush method for wicker crevices. Industry guide
9Homes & Gardens. "How to remove rust from metal garden furniture." homesandgardens.com — rust conversion chemistry; direct-to-rust paint as primer and converter. Established home & garden publication
10Today's Patio. "How to remove mold and mildew from outdoor furniture." todayspatio.com — vinegar-to-water ratios for wood and fabric; step-by-step mold removal protocol. Industry guide
Comments