You feel a breeze even when the window is shut tight. The Fix: Very doable.

💡 Check your warranty! Many windows have 10-to-20-year coverage for seal failure. You might get the glass replaced for free.

No. If the double-pane glass is foggy, you must replace the glass unit itself. The Anatomy of a Window Seal

These are the rubber or felt strips (weatherstripping) that seal the window when you close and lock it.

Here’s a clear, helpful post for a blog, forum, or social media: