Five habits that keep your lenses scratch-free for years

Modern lens coatings are tough, but they are not invincible. These five habits make the biggest difference.

• Rinse before you wipe. Dust is abrasive; lukewarm water or lens spray lifts it first.
• Use microfiber, not your shirt. Cotton traps grit and pushes it across the lens.
• Never use household glass cleaner. Ammonia and alcohol strip anti-glare coatings.
• Case them, lens-side up. Never put glasses face down on a table.
• Wash your cloth weekly at 40 °C, without fabric softener.