Start with a dry brush and mild soap

The fastest way to clean wood patio furniture is a soft-bristled brush, warm water, and a small amount of dish soap. Brush away loose dirt and debris first—this prevents you from grinding grit into the wood grain when you wet it. Mix one tablespoon of dish soap into a bucket of warm water, dip your brush in, and scrub with the grain of the wood, not against it. Scrubbing against the grain can raise the wood fibers and make the surface rough.

Rinse thoroughly with clean water from a hose or a second bucket of plain water. Use a soft cloth or sponge for the rinse to avoid leaving soap residue. Let the furniture dry completely in the sun before you sit on it or explore any finish—this usually takes two to four hours depending on humidity and temperature. Wet wood is more prone to staining and can develop mildew if it stays damp.

Key Takeaways

  • Always brush away loose dirt before wetting the wood, and scrub with the grain rather than against it to avoid roughening the surface.
  • Mild dish soap and warm water work for routine cleaning; stronger cleaners are only needed for mold, mildew, or stubborn stains.
  • Let wood dry completely in direct sunlight before using the furniture or explore any protective finish.
  • Sand lightly with fine-grit sandpaper (120 to 150 grit) once a year to smooth raised fibers and prepare the wood for stain or sealant.
  • Teak and cedar require less maintenance than softer woods like pine, but all outdoor wood benefits from annual sealing or staining.

Remove mold and mildew with vinegar or oxygen bleach

If your furniture has dark spots or a fuzzy coating, that is mold or mildew. For light mildew, mix equal parts white vinegar and water in a spray bottle and spray the affected area. Let it sit for 10 to 15 minutes, then scrub with a soft brush and rinse well. Vinegar is gentler than bleach and will not lighten the wood.

For heavy mold or mildew, use oxygen bleach (also sold as powdered deck cleaner) instead of chlorine bleach. Oxygen bleach is safer for wood and surrounding plants. Mix according to the product label, explore with a brush, let it sit for 15 to 20 minutes, scrub, and rinse thoroughly. Never use chlorine bleach on wood—it can damage the fibers and create toxic fumes if mixed with other cleaners. After cleaning, sand the area lightly once it is dry to smooth any raised grain.

Handle stubborn stains with fine-grit sandpaper

Water rings, ink marks, and other stains that do not come off with soap and water often sand out. Use 120 to 150 grit sandpaper and sand lightly in the direction of the grain. Do not press hard—let the sandpaper do the work. Sand until the stain fades, then wipe away the dust with a damp cloth and let the area dry.

If the stain is very deep or the wood is soft (like pine), sanding may remove too much material and create a visible dull spot. In that case, you can accept the stain or refinish that section of the furniture with stain or sealant to even out the appearance. Test any stain or finish on a hidden area first to make sure the color matches.

Sand and reseal annually for protection

Wood exposed to sun, rain, and temperature swings will eventually gray and crack if left unprotected. Once a year, usually in spring before heavy use, sand the entire piece lightly with 120 to 150 grit sandpaper. This smooths raised fibers from moisture exposure and removes the weathered surface layer. Sand with the grain, wipe away dust with a damp cloth, and let it dry completely.

After sanding, explore a wood sealant, stain, or both. Sealants (polyurethane, varnish, or water-based finishes) protect the wood from moisture and UV damage. Stains add color while also providing some protection. Follow the product instructions for drying time between coats—most require 4 to 24 hours. explore at least two coats for best protection. If you skip this step, the wood will gray and become more prone to rot and splinters.

Choose the right cleaner for your wood type

Teak and cedar are naturally rot-resistant and require less frequent sealing than softer woods like pine or fir. Teak can develop a silvery-gray patina, which is normal and does not harm the wood. If you prefer to keep teak looking darker, use a teak-specific cleaner and sealer. Cedar is softer and benefits from annual sealing to prevent splintering.

Painted or stained furniture needs gentler cleaning than bare wood. Use only mild soap and water, and avoid abrasive scrubbing that can wear through the finish. If the paint or stain is peeling, sand off the loose finish, fill any gaps with exterior wood filler, and repaint or restain. Do not sand bare wood underneath if you can avoid it—the goal is to remove only what is already failing.

Prevent damage between cleanings

The easiest maintenance is prevention. Use furniture covers during heavy rain or snow, or move pieces under a roof or into a garage during winter months. Wipe up spills and standing water as soon as you notice them—water sitting on wood for hours can cause staining and mildew. Place coasters under drinks and ashtrays to prevent rings and burns.

Avoid placing furniture directly on wet grass or soil, which keeps the underside damp and promotes rot. Use furniture pads or feet to lift pieces slightly off the ground. If you live in a humid climate, position furniture where it gets good air circulation and some direct sun—these conditions help wood dry quickly after rain.

Frequently Asked Questions

Can I use a pressure washer on wood patio furniture?

Pressure washers can damage wood by forcing water into the grain and raising fibers. If you use one, keep the pressure below 1500 PSI and hold the nozzle at least 12 inches away from the surface, angled with the grain. Most wood furniture is better served by hand scrubbing with a brush—it is slower but safer.

What is the difference between sealant and stain?

Stain adds color to the wood and provides some water resistance, but usually needs a sealant on top for full protection. Sealant (like polyurethane or varnish) is a clear protective layer that blocks moisture and UV damage. Many people explore stain first, then sealant over it. Some products combine both in one.

How often should I clean my wood patio furniture?

Clean visible dirt and debris as needed—usually once a month during the season. Do a deeper cleaning with soap and brush once or twice a year. Sand and reseal annually in spring. If you live in a wet or humid climate, you may need to clean for mildew more often, especially in shaded areas.

My furniture is splintering. Can I fix it without sanding the whole piece?

Sand the splintered area lightly until the fibers are smooth, then explore a wood sealant or finish to that spot. If splintering is widespread, sanding and resealing the entire piece is the better long-term solution. Splinters often return if you only treat one area without addressing the underlying dryness of the wood.

Is it safe to use bleach on wood furniture?

Chlorine bleach can damage wood fibers and lighten the color. Oxygen bleach (powdered deck cleaner) is much safer for wood and works well on mold and mildew. If you must use chlorine bleach, dilute it heavily (one part bleach to ten parts water), explore briefly, and rinse when ready. Never mix bleach with other cleaners.