Glass nail file care: cleaning, disinfecting and correct use

A glass file does not go blunt. That is the essential difference from an emery board – and the reason why a good glass file stays with you for years, while paper files are bought by the dozen.

If a glass file nevertheless stops gripping properly at some point, that is almost never down to wear. It is clogged. And that can be fixed in under a minute.

Why a glass file files at all

The filing surface of a real glass file is etched. This creates a surface of countless tiny depressions with sharp edges – and those edges remove nail material.

Because the structure lies in the glass itself and is not glued on, it cannot come off. It can only become clogged: nail dust collects in the depressions, the edges are buried, and the file slides over the nail instead of shortening it.

That is exactly the moment when many people believe the file is worn out. In fact it just needs water.

Cleaning: warm water is enough

Hold the file under running warm water and rub over the surface with your fingertips until the deposit comes loose. Then let it dry – done.

For stubborn residues a soft toothbrush helps. A drop of soap does no harm, but is usually unnecessary.

How often? Not after every use. The sensible moment is when you notice the file gripping less well.

Disinfecting and sterilising

Glass is not porous. It takes up nothing in which germs could survive – the decisive advantage over emery boards, which have to be thrown away after being used on someone else’s hand.

Boiling is the simplest method and harmless for all glass files.

Autoclaving is possible, but with one restriction: use clear, unprinted files for it. With coloured, lacquered or hand-painted models it depends on the lacquer whether it survives the temperature and pressure. When in doubt, the manufacturer’s specification applies.

For podiatry and foot care this is a practical point: an instrument that can be fully reprocessed does not have to be replaced after every treatment. How reprocessing is regulated overall is set out in our article on instrument reprocessing in podiatry.

What you should avoid

• The dishwasher – the function remains, but printing, hand painting and glued-on crystals usually do not survive the detergent chemistry
• Dropping it – the only real enemy. Glass breaks, and with a chipped corner you can no longer work cleanly
• Loose in the handbag – use the case supplied
• Scouring agents – they destroy the etched structure, which is exactly what makes the file

How to recognise a good glass file

Three ways of making them are out on the market; they look similar from the outside but differ clearly in durability.

Etched. The structure is introduced into the glass chemically. It is part of the material and lasts accordingly long.

Sandblasted. Grains of sand are shot onto the glass under pressure and break the surface open. At first that looks similar, but it does not create defined edges. Such files grip more weakly from the start and become smooth over time.

Coated. Abrasive grit is glued onto a glass carrier. Basically an emery board with a glass back – the grit comes off in use.

The practical test: run your fingernail across the surface. An etched file grips noticeably and evenly. If it merely feels rough without catching, caution is called for.

And a second pointer: if a file stops gripping after a few weeks and cannot be revived by washing, it was not etched.

Filing properly

One advantage of the glass file that often goes unnoticed: it seals the cut edge of the nail instead of tearing it open. That noticeably reduces splitting – especially with thin and brittle nails.

For that to work:

• File in one direction, not back and forth
• Work on the dry nail – nails softened after a bath fray more easily
• Apply it flat, not with the edge
• Without pressure – the structure works by itself

In brief

Warm water and fingertips keep a glass file working. Boiling disinfects, clear files also tolerate the autoclave. The dishwasher and hard floors are the only real risks.

An etched glass file is thus one of the few care instruments that you buy only once.

At nagelzange.de:

• Glass nail files – clear and coloured, in various lengths
• All nail files at a glance
• Buffing files for the shine after filing

Read also: Rustproof, nickel-plated, stainless steel – what is behind it?

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