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Cleaning, storage, repair and the heat that ruins more sunglasses than use ever does. What is fixable, what is not, and how to avoid finding out.

A small precision screwdriver and a single tiny screw on a clean white work surface under bright even light

Care · October 16, 2026 · 7 min When a sunglasses lens pops out: how to put it back without cracking it A lens that falls out usually means a loosened screw, a stretched rim or a frame that has been heated. Here is how to refit each type without cracking the lens, which cases need an optician, and how to stop it happening again.

An open suitcase on a hotel bed with folded clothes and a pair of sunglasses tucked inside

Care · October 16, 2026 · 7 min Travelling with sunglasses: packing, airports, and not losing them Sunglasses get lost and broken on holiday more than anywhere else. Here is how to pack them, what airport security needs, how to handle heat and salt water, and what to do if they break abroad.

A pair of sunglasses resting on a white notepad beside a pen on a plain desk

Care · October 16, 2026 · 8 min Sunglasses warranties: what they cover, what they never cover Most sunglasses warranties cover manufacturing defects and nothing else. Here is the difference between a defect and damage, what a claim needs, what consumer law adds, and whether extended cover is worth buying.

A length of woven cord and neoprene on weathered teak boat decking in bright sun

Care · October 16, 2026 · 7 min Sunglasses straps and retainers: the four types, and which one suits what you are doing Floating cords, neoprene straps, silicone grips and adjustable cords each solve a different problem. Here is what each is for, which actually floats, and how to fit one without stretching the arms.

A pair of sunglasses on a workshop bench beside machinery under a warm task lamp

Care · October 16, 2026 · 7 min Sunglasses lens replacement: when it is worth it, what it costs, and when to buy new Replacement lenses can be cheaper than a new pair, but only sometimes. Here is what the options cost, which frames can take them, why third-party lenses vary so much, and the cases where replacing is money wasted.

Sunglasses resting on weathered grey decking with dried salt crusting on the boards

Care · October 16, 2026 · 7 min Sunglasses and salt water: what it does and how to stop it Salt water does three separate kinds of damage to sunglasses — abrasive crystals, coating degradation and hardware corrosion. Here is what each does, the rinse routine that prevents all of it, and what cannot be undone.

A close side view of a dark sunglasses frame and its hinge on a plain grey surface

Care · October 16, 2026 · 7 min Squeaking sunglasses hinges: what causes it and how to fix it properly A squeaking hinge means metal rubbing metal with something gritty in between. Here is how to clean it, what to lubricate it with, what to never use, and when the squeak means the hinge is failing.

An open empty hard-shell eyewear case on a worn leather car seat in warm afternoon light

Care · October 16, 2026 · 7 min How to store sunglasses: the case, the car, and the three habits that ruin lenses Most lens damage happens when the sunglasses are not being worn. A hard case, lenses up, and never on your head or in a hot car. Here is what each habit actually does, and the storage rules that matter.

A sun-bleached dashboard and faded plastic trim in harsh direct sunlight showing chalky UV degradation

Care · October 16, 2026 · 7 min Do sunglasses expire? What actually degrades, and the honest answer on when to replace them Sunglasses do not have an expiry date and UV protection does not evaporate off a shelf. What does degrade is coatings, frames and fit. Here is what fails first, how to test a pair you are unsure about, and when replacement is genuinely due.

A pair of sunglasses on a wooden table beside a small dish in warm indoor light

Care · October 16, 2026 · 7 min Broke your sunglasses away from home? Field repairs that actually hold A lost screw, a popped lens or a snapped arm a long way from an optician. Here is what you can genuinely fix with what is to hand, what to improvise with, and what is beyond rescue.

A cold morning trail with mist hanging in still air among pine trees and frost on the ground

Care · September 30, 2026 · 4 min Why sunglasses fog up, and what actually stops it Sunglasses fog when the lens is colder than the air touching it and that air is humid. It happens when you stop moving, when you breathe upward, and when you step from cold into warm. Here is the physics in one paragraph and the fixes ranked by how well they work.

A car dashboard in full sun with heat shimmer rising from the black vinyl

Care · September 30, 2026 · 4 min Sunglasses left in a hot car: what the heat actually does to them A car dashboard in summer sun reaches temperatures that warp plastic frames, craze anti-reflective coatings and can delaminate a lens. The tint and the UV block survive; the frame shape and the coatings do not. Here is what happens at what temperature, and where to keep them instead.

Extreme close-up of a fine scratch across a dark glossy surface catching a line of light

Care · September 30, 2026 · 4 min Scratched sunglasses lens: what can be fixed, what cannot, and why toothpaste makes it worse A scratch in a sunglasses lens cannot be removed. Every home remedy, toothpaste, baking soda, car wax, either polishes off the coating around the scratch or fills it temporarily. Here is what each one actually does, when a scratch matters, and when to replace the lens.

A precision screwdriver set fanned out on a dark cloth beside tiny screws and a folded microfibre cloth

Care · September 30, 2026 · 4 min How to fix loose sunglasses: tightening the hinge, replacing a screw, and when to stop Loose sunglasses are almost always a hinge screw that has backed out. A small screwdriver and a quarter turn fix it. A lost screw is a two-dollar kit. A stripped screw or a cracked hinge is an optician's job. Here is each fix in order, and the two things that make it worse.

A folded grey microfibre cloth and a small spray bottle beside a running tap on a white counter

Care · September 30, 2026 · 4 min How to clean sunglasses without scratching the lenses Rinse first, then wash with a drop of dish soap and lukewarm water, dry with a clean microfibre cloth. Never wipe a dry lens, never use paper, and never use anything with ammonia or alcohol on a coated lens. The same method is right for polarized lenses.

An old leather sunglasses case with worn edges and a faded interior on a wooden desk

Care · September 30, 2026 · 4 min How long do sunglasses last, and does UV protection wear off? UV protection built into the lens material does not wear off. UV protection applied as a surface coating can. What ends a pair's life is usually scratches, a coating that has flaked, or a frame that has loosened, not an expired lens. Here is what actually ages and when to replace.