Outdoor sofa cushions are prone to developing a sour smell due to moisture, mildew, and lack of proper care. Here are some effective ways to keep them fresh and odor-free:

1. Regular Cleaning – Wash cushions with mild soap and water every few weeks. Use a brush to scrub off dirt and let them dry completely before placing them back.

2. Proper Drying – After rain or cleaning, ensure cushions are fully dry. Prop them up or use a fan to speed up drying and prevent moisture buildup.

3. Use Breathable Covers – Opt for covers made from breathable, water-resistant fabrics to reduce moisture retention while allowing airflow.

4. Store When Not in Use – If possible, store cushions indoors or in a dry, ventilated space during prolonged wet weather or off-seasons.

5. Apply Vinegar or Baking Soda – For mild odors, spray a vinegar-water solution or sprinkle baking soda, then wipe or vacuum after a few hours.

6. Avoid Plastic Storage – Store cushions in fabric bags instead of plastic to prevent trapped moisture and mildew growth.

By following these steps, you can extend the life of your outdoor cushions and keep them smelling fresh all season long.