You wear your glasses every day. They get smudged constantly. And the way most of us clean them — the corner of a t-shirt, a paper napkin, our breath — is actively damaging the lens coating.
Here's how to do it right, what to avoid, and the one fix that ensures the cleaning cloth is actually with you when you need it.
What NOT to use on your lenses
Paper towels and napkins
Wood fiber is abrasive. Even soft napkins create micro-scratches in the anti-reflective coating that compound over time. Your lenses end up cloudy, especially in bright light.
Your shirt
Cotton t-shirt fibers are too coarse for lens coatings. The polyester blend in most modern shirts is even worse — it picks up dust and grit from the day and grinds it into your lens. The fact that this is the most common way people clean their glasses is why most prescription lenses don't last as long as they should.
Glass cleaner (Windex, etc.)
Ammonia attacks the anti-glare and blue-light coatings. A few uses and the coating is permanently degraded. Same goes for any household cleaner with alcohol or acetone.
Your breath + wiping
Slightly less abrasive than dry wiping, but you're spreading mouth bacteria across your lenses. Not damaging — just gross.
What to use instead
Microfiber cloth (the right way)
Premium microfiber has fibers 100x finer than human hair. They lift dust and oil without scratching. Two rules: (1) the cloth itself must be clean — a microfiber cloth that's been in your pocket for two weeks has picked up dust that will scratch lenses on the first wipe; (2) use circular, gentle motions, not back-and-forth pressure.
Lens spray (optional)
A pH-neutral lens spray for stubborn smudges. Avoid anything labeled "glass cleaner" — lens cleaner is a different product.
Soap and water (when really dirty)
For lenses caked with sunscreen, hair product, or food: rinse under lukewarm water, add a single drop of dish soap, rub gently with fingertips, rinse, and dry with a clean microfiber cloth. Avoid hot water — it can crack lens coatings.
The real problem: you don't have a cloth when you need it
Talk to anyone who wears glasses. The cleaning routine isn't the issue. The issue is that the cloth is somewhere else. In a drawer at home. In your other coat. In the glasses case you don't carry. Stuck to a fabric softener sheet in the dryer.
Most eyeglass wearers own multiple lens cloths. Few of them can find one in the moment of need. So they default to a shirt corner. Which scratches the lenses. Which forces a new prescription sooner.
The fix isn't a better cloth. It's a cloth that's always on you.
Why an Insider Cloth solves this
An Insider Cloth attaches to the inside hem of your shirt. It's invisible from outside, never adds bulk to a pocket, and stays put through 100+ wash cycles on the iron-on version. Lift the hem, wipe, drop the hem — done.
It doesn't make you a better cleaner. It just makes sure you never have to default to your t-shirt corner again.
The simple cleaning routine
- Rinse lenses under lukewarm water for 10 seconds (removes loose dust).
- Apply one drop of dish soap or lens spray per lens.
- Gently rub with fingertips in circular motions.
- Rinse thoroughly.
- Dry with a clean microfiber cloth (your Insider Cloth works fine — or any clean microfiber).
Daily touch-ups during the day: just lift your shirt, wipe with the Insider Cloth, and you're back in business.
One more thing
Replace your microfiber cloth (or wash it) every 2–3 weeks. A loaded cloth, no matter how soft, scratches lenses. The Iron-On Insider Cloth goes through your laundry cycle with your shirt, so it refreshes itself automatically.