Scrape loose paint, sand smooth, spot-prime bare wood with exterior primer, and repaint with flexible acrylic paint to prevent re-peeling.

For gaps >¼ inch, use backer rod (foam filler) first, then caulk over it to prevent sinking.

Soak in hydrogen peroxide + baking soda paste, scrub gently, and rinse. Avoid abrasive pads on non-stick surfaces.