Short-Let Damage Reports: What a Photo Inspection Should Cover After Every Guest
Written by Iva, founder of Iva Cleaning Services London. Damage in a short let is rarely dramatic. It is a…
Limescale is the chalky white crust that builds up on taps, shower screens, tiles and inside the kettle. In London it is not a sign of a dirty home. It is a sign of the water. Thames Water classes all the water it supplies as hard, and the scale it publishes puts “hard” at 200 to 300 milligrams of calcium carbonate per litre. Every time a drop of that water dries on chrome or glass, it leaves a trace of mineral behind. Do that forty times a day in a family bathroom and you have a visible deposit within a fortnight.
This guide explains what limescale is, why some products shift it and others do not, how to treat each surface in a bathroom and kitchen without damaging it, and where a weekend of scrubbing stops being worth it. It is the same approach our team uses on a deep bathroom cleaning in London visit, scaled down to what you can do with a bottle of vinegar and an afternoon.
Limescale is mostly calcium carbonate, the same mineral as chalk and marble. It is left behind when hard water evaporates or is heated, which is why it gathers on anything that gets wet and then dries, and in anything that heats water: kettles, shower heads, the element in a washing machine.
Calcium carbonate dissolves in acid and does almost nothing in alkali. That one fact explains most of the frustration people have with cleaning it. Washing-up liquid, bleach and most “bathroom sprays” are neutral or alkaline, so they clean the soap scum sitting on top of the scale and leave the scale itself untouched. You scrub, it looks the same, you scrub harder and scratch the chrome.
The acids that work, from gentlest to strongest:
The rule for all of them: contact time beats force. An acid needs ten to thirty minutes sitting on the scale to dissolve it. A quick wipe does nothing except waste the product.
Chrome-plated brass, which is what most London taps are, handles vinegar and citric acid well. For the spout and the aerator at the end of a tap, fill a small sandwich bag with white vinegar, pull it up over the tap so the tip is submerged, and hold it with an elastic band. Leave it for thirty minutes, then unscrew the aerator and rinse out the loosened grit. The flow improves immediately; a blocked aerator is the most common reason a tap “sprays”.
Shower heads get the same treatment. If the head unscrews, drop it in a bowl of vinegar for an hour. If it is fixed, bag it as above. Afterwards, poke any blocked nozzles with a toothpick and run the shower hot for a minute. A head that has not been descaled in a year can lose a third of its flow to blocked nozzles, which is why “the shower has gone weak” is usually a limescale problem rather than a plumbing one.
Two cautions. Gold, brushed nickel, matt black and “living” brass finishes are coated or lacquered, and acid dulls or strips them; use the mildest option, test somewhere hidden, and rinse within ten minutes. And never leave vinegar pooled around the base of a tap where it meets a stone or composite worktop.
The cloudy film on a screen is limescale with soap scum on top. Spray with vinegar or citric acid solution, leave it ten minutes, then use a non-scratch pad in straight lines. Rinse, squeegee, and dry with a microfibre cloth. If a screen is heavily scaled, a second application with a plastic scraper held flat lifts what the pad will not.
The screen that stays clean is the one that is squeegeed after every shower. Thirty seconds a day stops the deposit forming in the first place, which is the only cure that lasts in a hard-water city.
Ceramic and porcelain tiles tolerate acid. Natural stone does not. Marble, limestone and travertine are calcium carbonate themselves, so an acid that dissolves limescale will dissolve the tile surface too and leave dull patches that no amount of cleaning fixes. If you are not certain what your tiles are, put a drop of vinegar somewhere hidden and watch for fizzing; if it fizzes, use a pH-neutral stone cleaner and accept slower progress.
Grout is porous and holds both scale and mould, which is why the two problems arrive together in a London shower. Treat the scale with citric acid and a stiff brush, rinse well, and only then treat any black spotting; mixing an acid with a chlorine mould product releases chlorine gas, so they are never used at the same time. We cover the mould half of that job in how to get rid of bathroom mould.
Inside the toilet, the brown ring at the waterline and the dark streaks under the rim are limescale stained by minerals, not dirt. Bleach whitens the stain for a day and leaves the scale. Lower the water level by pushing a toilet brush down the U-bend a few times, pour in a strong descaler or neat vinegar, leave it overnight, then scrub with a pumice stone made for ceramics. A pumice stone used wet will not scratch glazed porcelain and is the only thing that removes a ring that has been there for years.
The kitchen gets the same water and the same scale. A kettle needs descaling monthly in London: a half-and-half mix of water and vinegar, boiled and left to stand for an hour, then rinsed twice. Coffee machines take citric acid rather than vinegar, which lingers in the pipework. The kitchen tap and the splashback behind it follow the bathroom rules above. If you are working through the whole room, our kitchen deep cleaning checklist puts the descaling in the right order so you are not rinsing acid over a surface you have just finished.
Vinegar and patience handle a bathroom that is cleaned regularly. They struggle with three situations:
Our bathroom deep clean starts at £149 plus VAT for one bathroom and books about three hours. Descaling taps, shower heads, screens and tiles is part of that standard visit. For a bathroom where the scale has been left for years, there is a heavy limescale treatment add-on at £39 plus VAT, which is the extra time and the stronger products. Either way, our cleaners know which product goes on which surface, so your stone stays stone and your chrome stays bright. If the rest of the house needs the same attention, deep bathroom cleaning is often booked together with a kitchen deep clean.
A squeegee on the screen after every shower, a weekly vinegar wipe on taps, and a monthly kettle descale cover most of it. If you are renovating, a water softener on the incoming supply removes the calcium before it reaches the taps and is the only way to stop limescale rather than remove it. For everyone else, a clean bathroom in London is a maintenance habit, not a one-off.
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