How to Clean Your Sunglasses Without Scratching Them (A BMX Rider's Guide)

The fastest safe way to clean your sunglasses: rinse both sides under lukewarm water to knock off grit, add a drop of dish soap, rub gently with your fingertips, rinse again, then dry with a clean microfiber cloth. No paper towels, no shirt hem, no spit and wipe. That last one is how most scratched lenses happen, and on a $44.99 pair of polarized Vermillions, it's an easy habit to break.

If you ride BMX, your sunglasses take more abuse in a week than most people's take in a year. Dust off the tranny, sweat at the skatepark, dropped in the dirt on a bail, wiped with whatever's closest when you can't see the landing. All of that adds up to hairline scratches that fog your lenses and wreck the polarization over time. Here's how to actually keep them clean without trashing them.

What's the fastest way to clean sunglasses without scratching them?

Water first, always. Grit and dust are the enemy, not dirt itself. If you wipe a dry lens, you're dragging sand across polycarbonate like sandpaper. Run both sides under lukewarm water (not hot, it can warp the frame and break down lens coatings), work in a small drop of dish soap with your fingertips using a light circular motion, rinse it clean, then pat dry with a microfiber cloth. Thirty seconds, done. Keep a microfiber bag in your backpack or bag pocket so you're never reaching for your shirt.

Why do sunglasses get scratched in the first place?

Almost every scratch traces back to one of three habits: wiping a dry lens, storing them lens-down on a hard surface, or tossing them loose into a bag with keys and tools rattling around. BMX riders add a fourth: setting sunglasses on the ground next to the ramp or ditch while they session, then stepping near them or forgetting where they landed. A scratched lens isn't just a cosmetic problem. Deep scratches break up the polarized layer and the UV coating, which means the lens stops doing its actual job.

What should you never use to clean your lenses?

Skip paper towels, napkins, and tissues; they're made of wood fiber and will scratch polycarbonate over repeated use, even though they feel soft. Skip your shirt too, especially if you've been riding and it's covered in dust. And skip household cleaners: glass cleaner, vinegar, and anything with ammonia or bleach will strip the anti-scratch and mirror coatings right off the lens. Stick to water, mild dish soap, and a microfiber cloth. That combination handles sweat, sunscreen, dirt, and trail dust without touching the coating.

How do you clean sunglasses trail-side with no water around?

This is the real BMX scenario: you're at the DIY spot or the ditch, your lenses are covered in dust, and there's no sink for miles. Blow off loose dust first (a quick breath or a shake works), then use a dry microfiber cloth with light pressure to lift the rest. Don't press hard and don't grind in circles if you can still see grit on the lens; that's when scratches happen. A microfiber cloth in your pack is worth more than any spray cleaner for this exact situation. Save the water-and-soap clean for when you get home.

How often should you replace scratched sunglasses?

Most eyewear needs replacing around every two years with regular use, sooner if you're outside constantly or riding in rough conditions. But the real signal isn't a calendar, it's the lens. If you're seeing distortion, cloudiness, or scratches that catch the light and blur your vision, that's your cue, regardless of how new the frame is. A scratched lens has a compromised UV and polarization layer, and no amount of cleaning brings that back. At that point you're not cleaning them, you're replacing them.

Does polarized polycarbonate scratch easier than regular lenses?

Polycarbonate is actually more impact-resistant than glass or standard plastic lenses, which is why it's the standard for sport eyewear. But it's still a soft-ish plastic compared to a scratch-resistant coating, so it depends more on how you clean it than what it's made of. Every Vermillion frame runs polarized polycarbonate lenses for exactly this reason: they take a hit at the skatepark without shattering, and if you rinse before you wipe, they'll hold up for years.

Cleaning method comparison

Method	Safe for lenses?	Best for	Why avoid it otherwise
Water + dish soap + microfiber	Yes	End of session, at home	N/A, this is the gold standard
Dry microfiber cloth only	Yes, if lens is mostly dust-free	Trail-side, no water access	Grinds grit if lens is heavily caked
T-shirt or hoodie sleeve	No	Nothing, avoid it	Traps dust and sand that scratch on contact
Paper towel or napkin	No	Nothing, avoid it	Wood fibers are abrasive on coatings
Glass cleaner or vinegar	No	Nothing, avoid it	Strips anti-scratch and UV coatings

If you want frames that can handle the water-and-soap routine without the coating giving out early, it helps to start with a solid pair. Here's what we'd throw in a bag before a session:

Frequently asked questions

Can I use hand sanitizer to clean my sunglasses?
No. The alcohol in most sanitizers can break down lens coatings and frame finishes over time. Stick to water and mild dish soap.

Is it okay to clean sunglasses with hot water?
Keep it lukewarm. Water that's too hot can warp plastic frames and weaken the bond on lens coatings.

What's the best cloth for cleaning sunglasses?
A clean microfiber cloth, the same kind used for phone screens and camera lenses. Wash it occasionally too, since a dirty microfiber cloth can reintroduce grit.

Do scratches actually affect UV protection?
Yes. Deep scratches disrupt the coating that blocks UV rays and can reduce polarization performance, not just clarity.

How do I clean sunglasses that fell in dirt or sand?
Rinse first, before you touch them with anything. Wiping sand off a dry lens is the single fastest way to scratch it.

Should I store my sunglasses in a case?
Yes, lens-up or in a hard case when they're not on your face. Tossing them loose in a bag is one of the top causes of scratched lenses.