Vinegar as an all-purpose cleaner

Does it work?

Disputed

Disputed rather than supported or refuted, because the claim is not one thing. For limescale on acid-tolerant surfaces it is well supported and CleaningHQ recommends it — more strongly after Sprint 2, since a trade association was found listing it as a treatment. For degreasing and disinfection it fails on established chemistry, and on carbonate stone it is destructive. A single verdict would have to be wrong about one of those.

This is a verdict on whether the technique is effective. Whether it is safe on a particular surface is a separate question, answered below.

Where not to use it

Why it works

As an acid, vinegar reacts with carbonate deposits to give soluble salts, which is a sound and sufficient explanation for its effectiveness on limescale and hard-water films. The broader claim depends on mechanisms it does not have. Cutting grease requires either surfactancy, which emulsifies oils, or alkaline saponification, which converts fats into soaps; acetic acid does neither. Disinfection requires sustained contact at an effective concentration against the organisms present, and dilute acetic acid is a weak antimicrobial by comparison with products formulated and tested for the purpose. The mechanism that makes it useful is therefore the same one that bounds it, and the same one that makes it destructive on carbonate stone.

Background

Vinegar has a real and well-understood use in cleaning: as a dilute acid it dissolves limescale and mineral films, and it is cheap, widely available and low in acute hazard. Sprint 2 strengthened that half — the stainless steel trade association lists a dilute vinegar soak as an accepted route for adherent hard-water scale, which is better evidence than the claim's supporters usually have. From that narrow strength it has been promoted into a general-purpose cleaner said to handle grease, disinfection and almost any household surface, and the broader claim does not hold. Grease is removed by surfactants or by alkalis, not by weak acids. As a disinfectant it is substantially less effective than products formulated for the purpose. Most seriously, the same acidity that makes it work as a descaler makes it destructive to a specific and common set of surfaces — and those surfaces, kitchen worktops and bathroom stone among them, are exactly where general-purpose advice sends it.

Conditions

• Appropriate for limescale and mineral deposits on acid-tolerant surfaces
• Not appropriate where degreasing or genuine disinfection is the requirement
• Rinse thoroughly afterwards and dry — residue left in place continues to act

What it does not do

• It is a weak degreaser, because acids do not act on fats by any of the routes that remove them
• It is a weak disinfectant compared with products formulated for that purpose, and should not be relied on where disinfection matters
• Prolonged contact attacks rubber and some plastic seals, which is a common cause of appliance damage
• 'Natural' describes its origin, not its effect on surfaces: it is an acid, and it behaves like one
• Combined with salt, or left as a residue, it can pit stainless steel over time even though a rinsed descaling soak does not

What to use instead

• Citric acid — A mild solid acid, widely used for descaling. Effective on limescale, and destructive to carbonate stone for exactly the same reason.
• Neutral cleaner — A near-neutral surfactant cleaner. The recommended answer for natural stone of every kind, and the least interesting product in the catalogue for good reasons.
• Detergent — A surfactant-based cleaner. The general-purpose answer for greasy and particulate soil, and the correct first choice far more often than any specialist product.
• Sodium percarbonate (oxygen bleach) — An oxidising bleach that releases hydrogen peroxide in water. Gentler than chlorine bleach on fabrics and dyes, and it does not produce chlorine gas.