How To Clean Outdoor Cushions?
QUICK ANSWER
Mix 1 gallon water with 1 cup OxiClean and 1/4 cup dish soap. Spray onto outdoor cushions, scrub with a stiff brush, rinse thoroughly with a hose, air dry in the sun. For mildew, add 1 cup of diluted bleach to the mixture. For removable covers, machine wash on cold gentle.
Outdoor cushions accumulate pollen, dirt, bird droppings, food spills, and mildew faster than indoor cushions due to constant exposure to elements. Most are designed to handle aggressive cleaning since they're built for outdoor durability. The standard pro approach uses OxiClean, dish soap, and a stiff brush; this combination handles 90 percent of outdoor cushion problems. Here is the method plus how to address mildew specifically and prevent it going forward.
Why are outdoor cushions different?
Outdoor cushions are designed for weather exposure: UV resistance, water repellency, mildew resistance. The fabric (Sunbrella, Solarium, polyester blends) tolerates more aggressive cleaning than indoor upholstery. Most can be hosed down, scrubbed with brushes, and even washed with diluted bleach. The padding inside is closed-cell foam designed to repel water (or quick-dry foam that doesn't hold moisture). Cleaning codes don't typically apply to outdoor cushions; manufacturer guidance is usually 'water-safe' or specific to bleach use. Check the tag for any specific restrictions.
What is the basic cleaning method?
Take cushions outside or to a sturdy work area. Brush off loose dirt, leaves, and debris with a dry stiff brush. Mix the cleaning solution in a large bucket or spray bottle: 1 gallon water, 1 cup OxiClean (or other oxygen-based cleaner), and 1/4 cup dish soap (Dawn). Stir to dissolve OxiClean. Spray or apply the solution generously to cushions. Scrub with a stiff brush (deck brush works well) in circular motions. Let sit 15 to 30 minutes for the cleaner to break down dirt. Rinse thoroughly with a hose; flush out all soap residue. Air dry in the sun for 1 to 2 days; complete drying prevents mildew.
How do you handle mildew?
Mildew (the green or black spots on outdoor cushions) is mold and requires bleach to fully kill. Mix the basic cleaning solution and add 1 cup of household bleach. Test color-fastness in a hidden area first; some cushion fabrics can lighten with bleach exposure (though most outdoor fabrics are bleach-safe). Apply to mildewed areas, let sit 30 minutes, scrub aggressively with a stiff brush, rinse thoroughly. For severe mildew, repeat treatment. Dry in direct sunlight; UV kills any remaining mold spores. For removable covers, machine wash with bleach (1 cup added to the wash) and air dry in sun.
How do you prevent mildew?
Mildew thrives in damp conditions. Prevention: store cushions in a dry covered area when not in use; cover during rain; ensure cushions dry completely after rain before storing. Apply a fabric protector spray (303 Fabric Guard, Scotchgard Outdoor) annually to renew water repellency. Inspect monthly and treat mildew at first appearance. With prevention habits, outdoor cushions last 5 to 10 years; without, they degrade in 1 to 3.
Outdoor cushions clean up well with OxiClean, dish soap, and aggressive scrubbing. The fabric is designed to handle stronger cleaning than indoor upholstery. Add bleach for mildew. Dry thoroughly in sun. Prevention through storage and fabric protector spray dramatically extends cushion life. With proper care, outdoor cushions last as long as the patio furniture itself; without care, they need replacement every year or two. The few hours of seasonal cleaning save significant cost.
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