To maintain and clean traditional wallpaper, avoid using water and abrasive cleaners, and instead, use a dry or damp cloth to wipe away dust or dirt gently. For more stubborn stains, use a wallpaper cleaning solution specifically designed for the type of wallpaper, or gently rub the area with a soft, clean eraser. Regularly dust or vacuum the wallpaper to prevent dirt and dust buildup, and promptly repair any damage or peeling to avoid further damage.