What are the best maintenance tips for outdoor wooden staircases to ensure their longevity and durability?

To ensure the longevity and durability of outdoor wooden staircases, it is important to regularly clean and inspect them for any signs of damage. Apply a protective sealant or stain to prevent moisture damage and rot. Keep the stairs clear of debris and snow to prevent slipping and wear. Regularly check for loose or damaged boards and replace them as needed. Additionally, consider adding non-slip treads for added safety.