The mirror—a surface we pass by several times a day without really looking at it, until a smudge of toothpaste or a splash of soap suddenly mars the reflection. That’s when we reach for the nearest bottle—often a specialized glass cleaner that can come with a surprisingly high price tag.
According to Vitrissimo, a company specializing in professional window cleaning, diluted white vinegar is just as effective at preventing streaks as the commercial products found in the cleaning aisle. The formula is simple: 25 cl of white vinegar to 75 cl of hot water. Professionals themselves say the results easily rival those of supermarket sprays, yet cost about ten times less. This figure makes one seriously question the value of buying a product dedicated solely to this task.
This assessment—made by cleaning professionals who have no vested interest in promoting vinegar over their own products—is worth taking seriously. The explanation lies in basic chemistry: the acidity of white vinegar effectively dissolves greasy residues (fingerprints, various splashes) and the limescale deposits that cause whitish marks, without leaving a film once properly wiped away. Commercial products often rely on pleasant scents and ready-to-use formulas, but their fundamental chemical effectiveness is comparable to that of the product most of us already have in our kitchen cupboards.

What the task actually entails

Cleaning a mirror involves removing fingerprints, water splashes, and traces of toothpaste or makeup, then wiping the surface until the reflection is clear and streak-free. Allow about 5 minutes for a standard-sized mirror; it is a quick job, but one that requires good technique to avoid having to go over the same areas repeatedly.

Tips and tricks for a streak-free finish

At all costs, avoid cleaning in direct sunlight or on a surface that is still warm; the product dries too quickly in these conditions, causing streaks to set before you have time to wipe it off properly. Opting for a time when the light is soft—such as early morning or evening—guarantees a much clearer finish.
For the final wipe-down, newspaper remains a surprisingly effective old-school trick: its unique texture absorbs moisture without leaving behind lint, unlike some standard cloth rags. Alternatively, a clean, dry microfiber cloth works perfectly well, provided it is reserved exclusively for this task to avoid transferring greasy residues from previous cleaning jobs.
Technique matters, too: wiping using large figure-eight motions or working methodically from top to bottom prevents you from going over areas you have already cleaned, resulting in a more uniform finish than haphazard wiping.

You don't need an expensive specialized product to get a spotless mirror; according to industry professionals, diluted white vinegar works just as well—at a fraction of the cost. It’s a great way to rethink this daily ritual without breaking the bank.