INFORMATION ARTICLE
How to Clean Floor Tile Grout
London, England - March 18, 2026
Grout can go from fresh and clean to dingy and discoloured faster than almost any other surface in your home. We're here to help you understand why this happens and, more importantly, how to clean floors effectively.
Discover practical methods that remove embedded dirt, prevent future staining and keep your tiled floors looking their best.
Why tile grout gets so dirty
Understanding grout's composition explains why it collects dirt and can help you select the most effective cleaning methods.
Common causes of grout discolouration
Grout is a rough, porous material that fills spaces between tiles. It has a sponge-like structure, containing thousands of tiny holes that can trap dirt, grime and moisture. Unlike the smooth, sealed surface of tiles themselves, grout actively absorbs whatever settles on it.
Dirty water from mopping is one of the most common causes of discoloured grout. Although water can clean tiles effectively, it also spreads dirt from tiles into grout. Since grout usually sits lower than tile surfaces, dirty water can easily settle into these recessed areas.
Walking across floors in bare feet can also contribute to grout staining. Your feet can leave behind oils, sweat, skin and dirt, which is transferred directly into porous grout.
Spills penetrate deeply into unsealed grout – liquids seep into grout to the point where even regular cleaning won't remove the resulting stains. Coffee, wine, cooking oils and coloured beverages can create particularly stubborn discolouration that may get worse the longer it sits untreated.
Health and hygiene benefits of clean grout
Dirty grout harbours more than aesthetic problems. Grout can be a source of mould and mildew, particularly in bathrooms and kitchens. These tiny organisms can thrive in grout's porous structure, creating potential respiratory irritants and allergens.
Food preparation areas with contaminated grout pose hygiene risks, as bacteria can transfer between surfaces. Keeping grout clean creates a healthier environment throughout your home.
Clean grout can also improve indoor air quality by eliminating collections of dust, pollen and other allergens. When you walk across floors or clean surfaces with dirty grout, these trapped particles can become airborne, which may affect the air quality throughout your home. Regular grout cleaning removes these accumulated allergens before they circulate.
Floors with bright, clean grout lines also look and feel more hygienic and well-maintained.
The best way to clean floor tiles and grout
Effective grout cleaning starts by understanding which methods work for different situations and spaces.
DIY methods using household products
Most grout cleaning can be done with simple household ingredients – these natural methods avoid harsh chemicals whilst delivering excellent results:
Baking soda and hydrogen peroxide paste – baking soda acts as a mild abrasive that loosens dirt without scratching tile. Hydrogen peroxide cleans and brightens, while dish soap removes greasy grime.
Oxygen bleach solution - unlike chlorine bleach, oxygen bleach can clean grout without damage or discolouration. This method also requires minimal scrubbing – the chemical action does most of the work for you.
Steam cleaning – high-temperature steam loosens and lifts dirt, grime and bacteria from grout and tiles, making it an effective, eco-friendly solution. Steam penetrates the grout's porous structure, killing mould and bacteria while removing embedded dirt.
Professional-grade solutions and tools
When DIY methods don't deliver the desired results, professional-grade products offer more intensive cleaning power.
Specialised grout cleaning brushes – purpose-designed brushes feature stiff bristles angled specifically for reaching into grout lines while protecting the surrounding tile.
Professional tile and grout cleaning services – these services use industrial equipment combining high-pressure cleaning with powerful extraction, removing deeply embedded stains that may be impossible to reach with manual methods. Professionals can also apply protective sealers that prevent future staining and extend the time between deep cleans.
The Dyson WashG1™ wet floor cleaner offers advanced floor cleaning technology that maintains your tiles while protecting grout.
Its separate clean and dirty water systems mean you're always cleaning with a fresh solution rather than redistributing dirt. The hydration technology evenly distributes cleaning solution, while powerful extraction removes soil and water simultaneously, preventing dirty water from settling into grout lines.
Step-by-step: cleaning floor tile grout
A systematic approach to cleaning delivers great results with less effort. Follow these steps for professional-level grout cleaning at home.
What you need before you start
Gather supplies before you get to work to clean your grout efficiently without interruptions.
Cleaning solution – choose from baking soda paste, oxygen bleach, commercial grout cleaner or your preferred method. Make sure you have enough for the area you want to clean.
Scrubbing brush – select a brush that’s specifically designed for cleaning grout, with stiff bristles and a handle that fits comfortably in your hand.
Clean water and a bucket – change the water frequently, as using dirty water can counteract your efforts by redepositing dirt back into the grout.
Clean cloths – for applying cleaning solutions and rinsing away residue; microfiber mops or cloths work best, capturing and holding dirt rather than spreading it around.
Protective equipment – wear gloves when working with cleaning solutions and use knee pads to make floor-level scrubbing more comfortable.
Vacuum cleaner – remove loose dirt before applying cleaning solutions to prevent mud and dirt from spreading when it gets wet.
Cleaning techniques for different tile types
The grout cleaning process is the same across tile types:
Start in the corner farthest from your exit to prevent walking across freshly cleaned areas.
Vacuum or sweep thoroughly.
Apply your chosen cleaning solution to grout lines in manageable sections.
Let the solution sit for the recommended time, typically 5 to 15 minutes.
Scrub grout lines using firm pressure, working along the length of each line rather than across it.
Rinse thoroughly with clean water and change the water frequently.
Ensure all cleaning solution is rinsed from the grout, as leaving residue can attract new dirt.
Dry the tiles completely to prevent water spots.
How to maintain clean grout long-term
Proper maintenance can make future cleaning faster and easier.
Seal grout after cleaning to protect it grout from moisture and stains.
Clean spills immediately so they don’t have time to penetrate into the grout.
Place mats at entrances to trap dirt before it reaches tiles.
Repair damaged grout sections as soon as possible to prevent problems.
Vacuum regularly to remove loose dirt before it gets ground into the grout.
The Dyson WashG1™ wet floor cleaner separates clean and dirty water, addressing the fundamental problem of traditional mopping, where dirty water is absorbed into grout.
FAQs about how to clean floor tile grout
Steam cleaners work effectively on most types of tile grout. High-temperature steam loosens dirt, grime and bacteria without chemicals. Steam cleaning can be particularly effective in bathrooms, where mould and mildew accumulate.
However, overly aggressive steam cleaning can break down grout, making it softer and more porous, causing stains to return faster. Use moderate steam temperatures, keep the steamer moving rather than focusing heat on single spots, and only use steam cleaning methods once a month.
Regular maintenance using proper techniques can keep grout clean, so you won’t need to worry about replacing it. Dirty mop water is grout’s biggest challenge; traditional mopping spreads contaminated water that grout absorbs. The Dyson Submarine™ wet roller head solves this problem by picking up liquids, debris and tough stains, which are continuously extracted from the roller with each rotation.
Regular vacuuming removes dust before it embeds into grout. Vacuum tile floors at least weekly, more often in high-traffic areas, and use soft brush attachments that reach into grout lines without scratching tiles.
Air purifiers reduce airborne particles that eventually settle on all surfaces, including floors. Dyson air purifiers capture pollutants before they settle, reducing the dust that lands on your floors and grout.
