How to Care for Acetate Sunglasses: A Complete Guide

Knowing how to care for sunglasses properly is the difference between a pair that lasts a decade and one that looks tired after a single summer. Cellulose acetate — the material behind every Mr Boho frame — is more resilient than plastic but still responds to heat, pressure and the wrong cleaning cloth. Here's what actually works.

What Is Cellulose Acetate, and Why Does It Need Different Care?

Cellulose acetate is a plant-based material made largely from wood pulp and cotton fibres, prized for its depth of colour and the way it can be layered and polished to a glass-like finish. Unlike injection-moulded plastic frames, acetate is cut from solid sheets, which gives it richer texture but also means it behaves differently in heat and moisture. It softens slightly at high temperatures and can dry out over time if left in harsh conditions, which is why acetate frames care looks a little different from caring for metal or nylon eyewear. The upside: treated well, acetate ages gracefully, developing a subtle patina rather than a dull, brittle surface.

How Do You Clean Sunglasses Without Scratching the Lenses?

Most lens scratches come from dry-wiping with whatever's on hand — a T-shirt hem, a paper napkin, a tissue. These all carry tiny fibres or dust particles that grind against the coating under pressure. To clean sunglasses properly:

• Rinse the lenses under lukewarm running water first to remove grit, sand or dust before any cloth touches the surface.
• Add a small drop of gentle, alcohol-free dish soap and use your fingertips to work it across the lens.
• Rinse thoroughly and pat dry with a clean microfibre cloth — the same type used for phone screens or camera lenses.
• Avoid paper towels, clothing and standard tissues entirely; they're the leading cause of fine hairline scratches over time.

If you're shopping for a new pair with this routine in mind, browse the current sunglasses collection — every style ships with a cloth suited to this exact method.

Preventing Frame Warping and Loose Hinges

Acetate holds its shape well at normal temperatures, but heat is its main enemy. A car dashboard on a warm day, a bag left in direct sun, or resting sunglasses near a heater can cause the temples to soften and bend out of alignment. A few habits prevent this:

• Never leave sunglasses on a dashboard, even briefly — cabin temperatures can climb well above what acetate is designed to handle.
• Store them in a hard case rather than a bag or pocket, where they can be sat on or bent.
• Take frames off using both hands, one on each temple, rather than pulling from one side — this is the single biggest cause of loose or misaligned hinges.
• Have hinges checked and tightened periodically if you wear your sunglasses daily; a loose screw is a five-minute fix but a bent temple usually isn't.

The Solarte sunglasses are a good example of a chunkier acetate silhouette that's genuinely more forgiving day to day, while still holding a crisp shape.

Where and How to Store Acetate Sunglasses

Storage habits matter as much as cleaning. Left lens-down on a table, sunglasses pick up surface scratches from grit sitting on the counter. Tossed loose into a bag, they compete with keys, coins and phones for space. The better approach:

• Always store in a rigid case when not in use, especially when travelling.
• Keep them lens-up if you do set them down without a case, never lens-down.
• Avoid humid environments like steamy bathrooms for long-term storage — acetate can be affected by prolonged moisture exposure.
• Keep away from direct sunlight when stored, since UV exposure over months can gradually affect colour vibrancy.

Fixing Minor Scratches and Restoring Shine

Fine surface scratches on the acetate frame itself (not the lens) can sometimes be reduced with a small amount of non-abrasive polish designed for plastics, applied with a soft cloth in gentle circular motions. Lens scratches are a different story — coated lenses generally can't be safely buffed out at home without damaging the coating further, so prevention through proper cleaning remains the better strategy. To bring back shine on a frame that's picked up dust or fingerprint residue, a wipe with a barely damp microfibre cloth followed by a dry one is usually enough to restore the original gloss.

Frequently Asked Questions

Can I use glasses wipes on acetate sunglasses?
Pre-moistened lens wipes are fine for the lenses occasionally, but check they're alcohol-free, as high alcohol content can dull the acetate's finish over repeated use. For daily cleaning, soap and water plus a microfibre cloth is the more reliable option.

Why do my sunglasses feel loose after a few months?
This is almost always the hinge screws working loose from regular handling, not a fault with the acetate itself. A small eyeglass screwdriver can tighten them, or an optical store can do it in minutes.

Is it bad to leave sunglasses in a hot car?
Yes — this is the most common cause of warped acetate frames. Even a short time in a hot car can soften the material enough to distort the shape permanently.

How do I remove scratches from acetate frames?
Light surface marks on the frame (not the lens) can improve with a plastic-safe polish and a soft cloth. Deeper scratches or any lens damage generally can't be repaired at home.

Ready for a Pair Built to Last?

Good acetate, looked after properly, only gets better with age. Explore the full sunglasses collection designed in Spain, or start with the Solarte sunglasses for a shape built to handle everyday wear.