Learn how to safely clean natural stone floors without etching or staining. From daily care to what to avoid.
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Published on 15 May 2025
You’ve scrubbed the grout with a brush. You’ve mopped the floor twice. You may even have tried one of those Mrs Hinch-style cleaning tricks that looked convincing online.
And the grout is still grey, yellowed or dotted with black mould.
The problem is that there isn’t one best tile and grout cleaner for every floor. A product that works brilliantly on ordinary ceramic bathroom tile may be completely wrong for limestone, Victorian tiles or coloured grout.
So rather than giving you another long list of cleaning products, we’ve ranked our picks by the job they are actually best suited to.
Below, you’ll find our choice of the best grout cleaners of 2026 for general cleaning, mould and mildew, natural stone, smaller budgets and everyday bathroom upkeep, plus the point at which buying another bottle probably isn’t going to solve the underlying problem.
Tile itself can be relatively straightforward to clean. Grout is usually the awkward part.
Traditional cement-based grout is more porous than a glazed tile surface, so dirt, moisture, grease, soap residue and dirty mop water can settle into the grout lines rather than simply sitting on top. Silver Lining regularly sees floors where the tiles are reasonably clean but the dirty grout makes the entire floor look tired.
Bathrooms add another problem: moisture. Shower grout and bathroom grout can stay damp long enough for mould or mildew staining to appear, particularly around corners, silicone joints and poorly ventilated areas.
For this guide, we’ll concentrate on choosing the right product.
Before buying whichever grout cleaner happens to have the biggest promises on the bottle, check three things.
General dirt, grease, hard water stains and black mould are not the same thing.
A general grout cleaner may be excellent for grime but disappointing against established mould. A dedicated mould remover can work quickly on bathroom staining but may be unnecessarily harsh for regular cleaning.
Start by deciding what you are actually trying to remove.
Ceramic and porcelain tile are generally more forgiving than natural stone, although you should still follow the product instructions.
Natural stone needs considerably more care.
Marble, limestone, travertine, slate and other stone surfaces can react differently to chemicals. The Natural Stone Institute recommends identifying the stone and generally using neutral or mild non-acidic cleaners for routine care. Acidic products can etch calcium-based stones such as marble and limestone.
Period Victorian tiles also deserve a cautious approach, particularly if their condition, previous treatments or sealers are unknown.
Don’t assume a product is suitable just because the front says “tile cleaner”.
Bleach-based or strong mould products can create problems with some coloured grout, surrounding finishes and certain surfaces.
Natural stone is particularly important here: rather than applying a generic bathroom bleach cleaner, check that the specific product is approved for your type of stone and sealer. When in doubt, test any cleaner on an inconspicuous area first.
Prices below were checked in September 2026 and are approximate. Retail prices and promotions change regularly.
Best for: General dirty grout on kitchen and bathroom wall or floor tiles
Typical price: Around £6 for 500ml
Main caveat: Use a dedicated mould treatment if black mould is the real problem
HG Grout Cleaner is our best overall choice because it does exactly what most people searching for a grout cleaner for floor or wall tiles actually need: it tackles accumulated dirt in grout lines without pretending to be a solution for every possible stain.
HG describes its formula as a buffered cleaner designed for grout on wall and floor tiling. The manufacturer says it removes dirt and helps restore the grout’s original colour.
At the time of checking, B&Q listed the ready-to-use 500ml version at approximately £5.75–£6.75 depending on the listing.
It is a sensible first choice for a ceramic or porcelain tile floor where the grout has simply become dingy from normal use.
The limitation is important, though. HG itself recommends its mould-specific product where grout has black mould deposits.
Silver Lining verdict: The strongest all-round starting point for ordinary dirty grout.
Best for: Black mould and mildew around shower grout, silicone joints and bathroom surfaces
Typical price: Around £4–£6.50 for 500ml depending on promotions
Main caveat: A mould remover treats the visible staining; it doesn’t fix the moisture problem causing mould to return
If the grout is covered in black spots rather than ordinary grey grime, changing to a mould-specific product makes more sense than repeatedly scrubbing with a standard bathroom cleaner.
HG Mould Spray is designed specifically for black mould staining on areas including tile grout and silicone joints. Current retailer information describes it as a self-acting cleaner with results appearing within around 30 minutes.
Pricing varies considerably. Wickes listed a 500ml bottle at £6.50, while Morrisons had it on promotion at £4 when checked.
Remember that if your bathroom tile and grout becomes mouldy again shortly after every clean, the problem may not be the cleaner. Persistent moisture, condensation, ventilation or water ingress may need attention too.
Silver Lining verdict: Our pick when mould or mildew, rather than general dirt, is the main issue.
Best for: Deep cleaning natural and engineered stone and heavily soiled tiled surfaces
Typical price: Around £13 for one litre
Main caveat: It is a deep cleaner, not an everyday maintenance product, and it can remove existing sealers
Natural stone is where choosing the wrong cleaner for tiles becomes expensive.
LTP Grimex stands out because it is specifically intended for natural and engineered stone as well as surfaces including limestone, marble, ceramic and porcelain. LTP guidance describes it as a heavy-duty cleaner for grease, grime and ingrained dirt, including restoration work in historic settings.
One current UK retailer listed the one-litre bottle at £12.99. The same retailer warns that Grimex can remove existing sealers, meaning a previously sealed surface may need resealing after a deep clean.
That makes it very different from a casual weekly tile cleaner.
If you have marble, limestone or another natural stone floor, don’t reach for a random acidic bathroom spray or toilet bowl cleaner. Acidic products can etch calcium-based natural stone.
Silver Lining verdict: The most appropriate choice here for homeowners who need serious cleaning power but also need a product designed with natural stone in mind.
Best for: Small areas, ceramic tiles and light-to-moderate grime
Typical price: Roughly £2–£3 for 500g
Main caveat: It isn’t a specialist grout treatment and should be used gently
The Pink Stuff earns its place because it is inexpensive, easy to find and useful for smaller cleaning jobs.
The manufacturer lists ceramic tiles and showers among the suitable uses for the paste. It advises applying it with a soft cloth or sponge, rubbing gently and rinsing afterwards, while warning that excessive pressure could scratch some surfaces.
Prices vary, but current UK suppliers list 500g tubs at around £2–£3.
Would we choose it ahead of a dedicated best grout cleaner for badly stained grout? No.
But if you want an inexpensive product for a small ceramic tiled area and the grout is simply a bit grimy, it can be worth trying before moving to something stronger.
Use a soft cleaning brush rather than attacking the grout with maximum pressure.
Silver Lining verdict: Good value for light jobs, but not a substitute for specialist grout cleaning when the staining is established.
Best for: Soap scum and routine bathroom tile cleaning
Typical price: Around £3.50 for 600ml
Main caveat: Better for bathroom surfaces than heavily stained floor tile grout
Not every bathroom needs a deep clean.
For regular cleaning before soap residue and grime become deeply established, Cillit Bang Active Foam is a practical choice. The manufacturer says the foam is designed to penetrate and dissolve soap scum and bathroom dirt, with a five-minute dwell time under normal use.
Tesco recently listed the 600ml product at £3.50.
This is the product on our list most suited to regular cleaning rather than rescuing seriously dirty grout.
For ingrained floor tile grout, switch to a proper grout cleaning product and a suitable grout brush.
Silver Lining verdict: A convenient everyday bathroom cleaner that can help stop light build-up becoming a bigger job.
Buying the right product is only half of the job. How you use it matters too.
Avoid excessive aggression on damaged or crumbling grout.
Yes, in some situations, but it shouldn’t automatically be your first choice.
Bleach-containing products can help tackle biological staining and black mould, particularly on light grout. However, strong chemical cleaning can affect coloured grout, surrounding finishes and some sealers, so always follow the product label and spot-test first.
Natural stone requires even more caution.
There isn’t a useful universal rule that every trace of bleach will destroy every natural stone. In fact, specialist stone-care guidance allows diluted bleach for some biological stains. But the correct treatment depends on the stone itself, its finish and any sealer already present. Neutral or mild non-acidic cleaning remains the safer routine approach.
And never mix bleach with ammonia or other cleaning products. The Natural Stone Institute specifically warns that mixing bleach and ammonia creates a dangerous toxic gas.
Sometimes the best grout cleaning product is not another bottle.
Professional help becomes worth considering when you have:
Cracked grout is especially important. Silver Lining’s existing grout guidance notes that cracking can indicate movement elsewhere in the tiled floor, so simply scrubbing harder won’t solve the underlying issue.
For normal dirty grout, start with a dedicated grout cleaner such as HG.
For black mould, use a mould-specific treatment.
For natural stone, choose a product specifically designed for stone, such as LTP Grimex for a deeper clean, and pay close attention to existing sealers and the manufacturer’s instructions.
For lighter jobs, inexpensive products such as The Pink Stuff may be enough. And for routine bathroom upkeep, a shower spray or bathroom foam can help prevent soap scum and grime from developing into something harder to remove.
Most importantly, don’t keep buying increasingly aggressive cleaning products if the grout is telling you something else is wrong.
Deep staining, damaged grout and specialist floors often need more than another round with a scrub brush.
If your tile and grout still look tired after DIY cleaning, Silver Lining Floor Care can assess the floor and recommend the appropriate next step.
Frequently Asked Questions About Tile Cleaning and Stain Removal
For visible black mould around bathroom grout and silicone, we would choose a dedicated mould treatment rather than a general-purpose grout cleaner. HG Mould Spray is our pick in this guide because it is specifically designed for mould staining on tile grout and similar bathroom areas.
If the mould keeps returning shortly after cleaning, investigate why the area remains damp rather than simply repeating the treatment.
Not necessarily.
Ceramic tile is usually more tolerant of household cleaning products than natural stone. Marble, limestone and other stone surfaces can be damaged by unsuitable chemicals, particularly acidic cleaners.
Always check that the cleaner is approved for your specific stone and finish.
There is no single schedule that suits every floor.
Regular light cleaning is better than waiting until the grout becomes heavily soiled. Whether grout or stone needs sealing, and how often, depends on the material, existing treatment, traffic, moisture and the sealer manufacturer’s instructions.
A sealer can make a surface more stain-resistant, but it does not make grout or stone completely stain-proof.
Because cleaning removes the mould staining without necessarily removing the conditions that allowed it to grow.
Persistent condensation, poor ventilation, damp silicone joints, leaks or another moisture source can all contribute. If you continually clean bathroom grout and the black staining quickly returns, investigate the moisture problem as well.
Remove dry debris first, use the mildest product suitable for the staining, allow the correct dwell time, agitate with a suitable brush and rinse thoroughly.
Avoid assuming that stronger chemicals or harder scrubbing automatically produce a better result.
Contact us for more information.