The short answer: Clean anti-reflective coated glasses with lukewarm water, a drop of lotion-free dish soap, and a clean microfiber cloth — or, better, an ultrasonic cleaner. Never use alcohol, ammonia glass cleaner, paper towels, or a dry, dusty cloth. AR coatings are soft and scratch easily, so the goal is to lift dirt off without rubbing it across the lens.
Why AR coatings need special care
Anti-reflective (AR) coatings are thin layers bonded to the lens surface to cut glare and reflections. They make your vision clearer, but they’re delicate. On the Mohs hardness scale an AR coating sits around 4 to 5, while ordinary household dust reaches 6 to 7. That means a single grain of grit on a dry cloth is harder than the coating itself — and every wipe drags it across the surface, leaving fine scratches that build into permanent haze.
Most “ruined” AR coatings aren’t defective. They’re worn down by months of dry wiping.
The safe way to clean AR glasses by hand
- Rinse first. Hold your glasses under lukewarm running water for a few seconds to wash away loose dust before anything touches the lens.
- Add a tiny drop of lotion-free dish soap. Rub it gently over both sides of each lens and the frame with your fingertips.
- Rinse thoroughly. Make sure no soap film remains.
- Dry with a clean microfiber cloth. Only on a wet lens, and only a cloth that’s genuinely clean — never the one living in your pocket or bag.
Lukewarm, never hot: high temperatures can stress and crack coatings over time.
What to avoid completely
- Alcohol and acetone — strip and cloud AR coatings.
- Ammonia-based glass cleaner (Windex and similar) — not made for optical coatings.
- Paper towels, tissues, napkins — wood-based fibres are abrasive and scratch.
- Saliva or breath-and-wipe — smears and adds bacteria, cleans nothing.
- Dry wiping a dusty lens — the single biggest cause of coating scratches.
For the full breakdown, see what you should never use to clean glasses.
The safest method: ultrasonic cleaning
Because nothing physically touches the lens, ultrasonic cleaning is the gentlest option for coated glasses. The device sends high-frequency vibrations through water, lifting dirt, oil, and bacteria off the lens, frame, and hinges at once — no rubbing, so no scratching.
Lensio is tested specifically on AR, HEV, and UV coatings, so it cleans deep without weakening the layers you paid for. Add water and a tablet, drop your glasses in, press once, and they’re done in three minutes. Learn more in ultrasonic vs. microfiber.
Frequently asked questions
Can I use lens wipes on AR coatings? Pre-moistened lens wipes labelled safe for coated lenses are fine for a quick clean, but check they’re alcohol-free. They still can’t reach the frame and hinges.
Why do my AR glasses look smudgy no matter what? Usually the coating has fine scratches from dry wiping, or there’s a thin soap or oil film. A proper wet clean — or an ultrasonic cycle — usually fixes the film. Scratches, unfortunately, are permanent.
Is an ultrasonic cleaner safe for AR coatings? Yes, when the device is designed for eyewear. Since it cleans without contact, it’s gentler than any cloth. Lensio is coating-safe tested.