Five simple tricks to protect glasses from scratches and costly damage

Glasses are no longer simply a visual aid; they are an expensive everyday essential, often featuring anti-reflective coatings, blue-light filters, varifocal lenses and tinted lenses. These very coatings are sensitive to incorrect care. Anyone who continues to rub their lenses with kitchen roll or a T-shirt risks dull, scratched lenses and, consequently, poorer vision. The good news is that a few easy habits can keep glasses clear for much longer.

Why most cleaning habits damage glasses

Many people automatically reach for whatever is nearby: a tissue, paper towel, sleeve or scarf. A quick wipe and the job is done - or so it seems. In reality, this hurried rubbing can act like very fine sandpaper on the lenses.

“Even tiny grains of dust or sand on paper or fabric can grind permanent micro-scratches into the coating.”

Hot tap water and harsh household cleaners create an additional problem, as they can damage the lenses’ surface treatment. Anti-reflective coatings, hard coatings and blue-light filters may lift or develop patchy marks. The same applies to non-prescription sunglasses, which are often coated too.

Cleaning mistakes you should stop making immediately

• Cleaning with a paper tissue or kitchen roll
• Rubbing glasses with a jumper, T-shirt, scarf or jacket
• Rinsing them under very hot water
• Using window cleaner, multi-purpose cleaner or nail polish remover
• Wiping dusty lenses while dry, without rinsing them first

Avoiding these common mistakes already takes you a long way towards scratch-free glasses. The next step is to clean them correctly.

1. Water and mild washing-up liquid or hand soap: the foundation

Rather than using costly specialist sprays, a simple combination of lukewarm water and a mild cleaning product will be enough for most day-to-day cleaning.

Proceed as follows:

1. Wash your hands thoroughly so grease and dirt are not transferred to the lenses.
2. Hold the glasses under cold to lukewarm water - never hot water.
3. Put a drop of mild, grease-cutting washing-up liquid or gentle hand soap onto your fingers.
4. Gently massage the lenses and frame with your fingertips, including the nose pads and temple tips.
5. Rinse everything thoroughly with water until no soap residue remains visible.
6. Carefully pat the glasses dry with a clean, soft cloth.

Many opticians specifically recommend this approach. It cleans effectively, costs little and is suitable for most coatings. Another advantage is that it reduces smears and can make the lenses less prone to steaming up for a while.

2. Microfibre cloth instead of paper: the best option when out and about

For a quick clean between washes, a microfibre cloth is the first choice. Its fine fibres lift grease, dust and fingerprints effectively without harming the lens surface.

“Microfibre traps dirt rather than simply spreading it around - protecting the coating and keeping vision clear.”

What matters when using a microfibre cloth:

• Use only soft, lint-free microfibre cloths.
• Store the cloth in a case or pouch so that sand and dust cannot collect on it.
• Do not carry it crumpled up with other textiles in a trouser pocket.

If a microfibre cloth is unavailable, a clean, smooth cotton cloth can be used in exceptional circumstances - for example, a fresh fabric handkerchief without texture. Coarse materials containing wool or denim are unsuitable, as their fibres are too hard.

The frame needs care too

Many people clean only the lenses and overlook the rest. However, skin oils, make-up, hairspray and sweat build up on nose pads, hinges and temple tips. This not only looks unattractive but can, in extreme cases, cause skin irritation.

Regularly wipe the following areas with a microfibre cloth:

• The bridge and nose pads
• The inner sides of the temples
• The hinge area, where dust often gathers

A few seconds of care once a day is usually enough to keep glasses hygienically clean.

3. Wash the microfibre cloth itself regularly

A dirty cloth rubs its accumulated grime directly into the lens coating. Many people use their glasses cloth for months without washing it, then wonder why increasingly fine scratches appear.

“If the cloth is grey, greasy or smells odd, the dirt goes straight onto the lenses - and scratches can follow.”

How to care for the cloth properly:

• Wash it regularly in the washing machine at 30 to 40°C.
• Do not use fabric conditioner, as it coats the fibres like a film.
• Leave it to air dry rather than putting it through a tumble dryer on high heat.
• Replace it completely at least once a year, or sooner if it is used heavily.

If you clean your glasses several times a day, ideally wash the cloth once a week as well. Keeping a second spare cloth is also useful, particularly for travelling or the office.

4. Make lenses shine with vinegar cleaner - but use it with care

Household vinegar can make glass surfaces shine and remove grease. Many people also use it on spectacle lenses in a heavily diluted form. The correct mixing ratio and the compatibility of the lens coating are crucial.

Mixture	Guidance
50% water, 50% clear household vinegar	Pour into a spray bottle and use sparingly
A few sprays on the lenses	Spread with a microfibre cloth and rub dry

Before trying it, check the information supplied by your optician or ask in the shop whether vinegar treatments are compatible with your particular lenses. Some high-tech coatings are sensitive.

Professionals generally advise against using:

• Window cleaner
• Kitchen multi-purpose cleaner
• Acetone or nail polish remover
• Methylated spirits or aggressive solvents

These products contain substances that can attack plastics and coatings. Lenses may become dull, develop streaks or discolour.

5. Ultrasonic cleaner: professional glasses care at home

Many opticians use ultrasonic devices to clean glasses thoroughly and hygienically. Compact models for home use are now available at much lower prices.

“Ultrasound cleans where no cloth can reach - in hinges, between the frame and lens, and around tiny screws.”

This is how the process works:

• The device has a small basin filled with water and a suitable cleaning product.
• The glasses are placed in an insert basket so they do not rest directly on the metal base.
• Once switched on, the device generates high-frequency sound waves that create tiny bubbles.
• These bubbles burst on the surface, loosening dirt even from narrow gaps.

Many models complete a cleaning cycle in under a minute. This method is particularly useful for:

• Heavily soiled nose pads
• Glasses exposed to lots of make-up or hairspray
• Frames with numerous small gaps and intricate designs
• Cleaning jewellery such as rings or necklaces at the same time

Anyone using an ultrasonic device should always consult the instruction manual to check which cleaners are approved, and ask their optician if unsure. Some natural materials, including certain horn or wooden frames, are not suitable for this method.

How often should glasses really be cleaned?

Many people clean their glasses only when their vision has noticeably become cloudy. A brief, regular check is better.

• Daily: Remove dust and fingerprints with a microfibre cloth, especially in the evening.
• Every few days: Give them a thorough wash with water and mild washing-up liquid or hand soap.
• After heavy exposure: Rinse the glasses straight away after sport, gardening or cooking.
• Every few weeks: Use ultrasonic cleaning at an optician’s or at home if needed.

Anyone regularly exposed to significant amounts of dust, building-site environments or flour, such as in a bakery or kitchen, should rinse their glasses more frequently to prevent debris from settling.

The risks of scratched and dirty lenses

This is not merely an aesthetic issue. Scratched or constantly smeared lenses can cause headaches, rapid fatigue while reading and uncertain perception in traffic.

Fine scratches are particularly deceptive: individually, they are barely noticeable, but together they scatter more light. In backlight, headlights or sunshine, this creates reflections that make seeing considerably more tiring.

There is another issue: more heavily soiled lenses encourage people to rub them more often and more forcefully, frequently with whatever happens to be at hand. This creates a vicious circle that steadily wears away the coating.

Practical everyday tips for glasses

A few small habits will help keep glasses clear for longer:

• Always store glasses in a rigid case, never loose in a bag or rucksack.
• Never place them on a table with the lenses facing downwards.
• When cooking or frying, keep some distance from a hot pan so greasy spray does not settle on the lenses.
• Remove glasses where possible at the hairdresser or while colouring your hair, so chemicals do not get onto the lenses.
• Use a glasses strap or sports glasses during exercise to prevent them slipping and becoming scratched.

Keeping a separate clean microfibre cloth in every handbag or car makes it less likely that you will automatically reach for a sleeve or napkin. These small precautions cost far less than replacement lenses from an optician.

Glasses are precision products. With the right cleaning routines, they can be used for many years without becoming cloudy. Just a few minutes of care each week is enough to maintain clear vision, fewer headaches and a relaxed view through genuinely clean lenses.