How to Clean Sport Sunglasses (Without Scratching the Lens or Coating)

Knowing how to clean sunglasses properly is something most people skip over — until a smear, smudge, or sweat streak gets bad enough to actually mess with their vision mid-ride or mid-run. Sport sunglasses pick up more grime than everyday eyewear: sunscreen, sweat, dust, trail spray, and fingerprints all accumulate fast during active use. And if you're wearing photochromic sport sunglasses, the lens coating is doing a lot of work — it deserves to be treated right. This guide covers the safest, most effective way to clean sport sunglasses without scratching lenses, damaging coatings, or shortening the life of a pair you paid good money for.

What You Need to Clean Your Sunglasses (And What to Avoid)

Getting this right starts with what you use. Most lens damage happens not from dirt, but from cleaning with the wrong materials. Here's the breakdown:

Safe to Use

• Microfiber cloth — The only safe dry-wiping tool. Purpose-made for lenses.
• Lens cleaning spray — Alcohol-free, designed for coated lenses. Most optical or outdoor retailers carry these.
• Mild dish soap — A single drop of Dawn or similar, diluted with lukewarm water, works well for a thorough clean.
• Lukewarm water — Rinse under a gentle stream to remove grit before wiping.
• Clean fingers — Gentle pressure with clean fingertips when applying soap solution is safe on lenses.

Never Use These on Sport Sunglasses

• Your shirt or any fabric except microfiber — Even soft cotton contains microscopic fibers that scratch lens coatings over time.
• Paper towels or tissues — Same problem. Wood-fiber paper is abrasive to optical coatings.
• Window cleaner or household sprays — Ammonia, bleach, and acetone strip anti-reflective and photochromic coatings.
• Rubbing alcohol or hand sanitizer — Degrades coatings, warps frames over time.
• Hot water — High heat softens frame materials and can affect adhesive in polarized or laminated lenses.
• Dry wiping gritty lenses — Dragging sand or dust across a dry lens is how scratches happen. Always rinse first.

Step-by-Step: How to Clean Sport Sunglasses the Right Way

This whole process takes about 60 seconds. Do it right and your lenses will last for years without hazing or micro-scratch buildup.

1. Rinse under lukewarm running water. Hold the frames under a gentle stream. This floats away grit, salt, and sweat before anything touches the lens surface. Never skip this step.
2. Apply a single small drop of mild soap to your fingertips (or mist with lens cleaning spray). If using soap, dilute it slightly by wetting your fingers first.
3. Gently work the solution across both lens surfaces. Use your fingertips only — no pressure, no scrubbing. Cover the full lens, including edges near the frame.
4. Rinse again thoroughly. Make sure all soap residue is gone. Soap left on the lens dries into a film.
5. Shake off excess water, then pat dry with a clean microfiber cloth. Don't rub or drag. Light dabbing pressure is enough — the microfiber does the work.
6. For a quick field clean between rinses: Breathe on the lens to lightly mist it with moisture, then wipe with the microfiber from the pouch or case. This works for fresh smudges but isn't a substitute for a proper rinse.

That's it. No special tools, no gadgets — just water, mild soap, and a microfiber cloth.

Cleaning Photochromic Lenses: Handle with Extra Care

If you're running photochromic sunglasses — lenses that darken in UV light and clear up in shade — the cleaning rules above still apply, but with a few extra notes.

The photochromic compound is embedded in the lens material itself, not applied as a surface coating, which makes it reasonably durable. But the other coatings layered on top — anti-reflective, scratch-resistant, hydrophobic — are still vulnerable to harsh chemicals. Stick to the alcohol-free, ammonia-free rule religiously.

A few specifics for photochromic lenses:

• Avoid leaving them in a hot car. Prolonged heat exposure can accelerate lens fatigue and affect how quickly the photochromic compound transitions over time.
• Don't store them face-down. Even on a soft surface, this risks micro-scratches over repeated contact.
• Check your case. Make sure the interior is clean. Grit that falls into the case transfers directly to the lens the next time you open it.

Tom Best, a long-time BOLD goggle customer who upgraded to the Morningside Max AutoTint, put it well: "with these new lenses, I may never have to change them again" — but the only way that holds up is caring for those lenses properly from the start.

How Often Should You Clean Sport Sunglasses?

This depends on use, but here's a simple framework:

Situation	Clean Type	Frequency
After a ride or run with sweat, dust, or sunscreen	Full rinse + microfiber dry	Every time
Mid-activity smudge or fingerprint	Quick field clean (breath + microfiber)	As needed on the trail
Light daily wear, low sweat activity	Microfiber wipe	After every use
Extended storage or end of season	Full clean + store in hard case	Before putting away

The short version: rinse and dry after every active use session. Everything else follows from that habit.

Common Mistakes That Quietly Wreck Your Lenses

Most lens damage is cumulative and avoidable. These are the most common ways sport sunglasses get ruined:

• Wiping dry grit off a dry lens. If there's dust or trail debris on the lens and you wipe without rinsing first, you're dragging abrasive particles across the surface. Always rinse first, always.
• Leaving them on your car dashboard. UV plus heat plus close-range infrared exposure from sunlight through glass is harsh on frames and lens coatings. Use a case or stash them in the glove box.
• Sunscreen contact. Sunscreen is a major offender — it degrades lens coatings fast if left sitting on the surface. If you get sunscreen on your lenses, rinse it off with water as soon as you can.
• Fogged breath + aggressive wiping. Breathing on the lens and then rubbing hard with any fabric works great for making micro-scratches. Light dabbing only.
• Using the wrong cleaner. Lens sprays that work fine on prescription glasses can still contain alcohol. Double-check the label — alcohol-free is the standard to look for with sport lenses.
• Skipping the case. Tossing sunglasses loose into a bag, pocket, or pack without a pouch or case invites scratches from keys, carabiners, and anything else that's in there. The pouch your sunglasses come with is meant to be used.

Storing Your Sport Sunglasses Between Uses

Cleaning them right is only half the job. Proper storage keeps them clean longer and prevents damage in the first place.

• Hard case for travel. If you're putting sunglasses in a bag, backpack, or checked luggage, a hard case is the only safe option. Soft pouches protect against scratches but won't stop a bag getting sat on.
• Clean microfiber inside the case. Check the case lining periodically. Grit accumulates inside cases and transfers to lenses on the next open-and-close cycle.
• Don't hang them from your collar or stack on your head. Both habits leave the lenses exposed, pick up skin oils and hair product, and put unnecessary flex stress on the frames over time.
• End-of-season storage: Full clean, dry completely, store in a hard case in a cool, dry location away from direct sunlight.

Frequently Asked Questions

What is the best thing to clean sunglasses with?

A lens cleaning spray (alcohol-free) combined with a clean microfiber cloth is the safest and most effective option for regular cleaning. For a deeper clean after sweaty activity, lukewarm water and a single drop of mild dish soap work well. Always dry with a microfiber cloth, never paper or fabric.

Can I use Dawn dish soap to clean my sunglasses?

Yes — a tiny amount of Dawn (or similar mild dish soap) diluted with lukewarm water is one of the best options for a thorough clean. It cuts through sunscreen, sweat, and oils effectively without stripping coatings. The key is to use very little soap and rinse it off completely. Avoid dish soaps with added moisturizers or antibacterial agents.

How do you make foggy or hazy sunglasses clear again?

Haziness is usually the result of coating degradation, hard water mineral deposits, or soap film left behind from a previous clean. Try a gentle clean with lens spray and a fresh microfiber cloth. For hard water buildup, a diluted white vinegar solution (one part vinegar, three parts water) can help — but test on an inconspicuous spot first and avoid on photochromic lenses. If the haziness is internal scratch damage, the lens can't be restored and may need replacing.

Is it safe to use lens cleaning spray on photochromic sunglasses?

Yes, as long as the spray is alcohol-free and ammonia-free. Standard eyeglass lens sprays from optical retailers meet this standard. Avoid any spray marketed for electronics screens or household glass — those formulas are not safe for coated optical lenses.

How do I clean the nose pads and frame on sport sunglasses?

The same mild soap-and-water solution works for frames, nose pads, and temple arms. A soft toothbrush can help get into textured nose pad grooves where sunscreen and sweat collect. Rinse thoroughly and dry with a microfiber cloth. For rubber or silicone components, avoid alcohol-based cleaners as they can dry out and crack the material over time.

Take Care of the Right Pair

The best sport sunglasses are the ones that last — and they last because you take care of them. If you're in the market for photochromic sport sunglasses that adapt to changing light on the trail, road, or mountain, or prefer a fixed-tint lens built for specific conditions, BOLD has both. And if you want to try before you commit, the Try Before You Buy program lets you test a pair at home for free before you pay — no guessing on fit or tint.

For more on which sunglasses work best for your activity, check out our guides to cycling sunglasses, trail running sunglasses, and polarized vs. photochromic — which wins for sports.