How to Clean a Bathroom: A Room-by-Room Guide
Most bathroom cleaning guides are written for people who’ve never cleaned a bathroom before. This one assumes you have — and focuses on what actually matters.
The guide covers every surface in a typical Australian bathroom: tiles, grout, shower screens, silicone sealant, toilets, basins, tapware, drains, and exhaust fans. It tells you what to use, how often, and in what order. It also covers something most cleaning guides skip entirely: how to tell the difference between a surface that needs a good scrub and a bathroom that has a structural problem underneath. Those are two very different situations, and treating the second one like the first is how small issues become expensive ones.
One thing this guide doesn’t cover: waterproofing rectification, substrate assessment, or structural repair work. Those aren’t maintenance tasks. They require a licensed specialist.
What You’ll Need Before You Start
Get everything together before you begin. Stopping halfway through to hunt for a grout brush is a good way to leave cleaning product on a surface longer than intended.
- pH-neutral tile cleaner — not acid-based on natural stone
- Non-abrasive bathroom spray for general surfaces
- Mould-specific fungicide for grout and silicone
- Grout cleaner or bicarb paste for heavier staining
- White vinegar or purpose-made glass cleaner for screens
- Limescale remover for tapware — check finish compatibility first
- Stiff-bristle grout brush
- Non-scratch scrubbing pad
- Microfibre cloths — several; you’ll go through them
- Old toothbrush for silicone lines and tight corners
- Squeegee for shower screens
- Bucket and rubber gloves
Before you start: Open a window or switch on the exhaust fan and leave it running throughout. Cleaning products in an enclosed wet area concentrate quickly — this applies especially to mould treatments and anything bleach-based. And do not mix bleach with ammonia-based cleaners. The reaction produces chloramine gas. Neither product label will tell you the other one is already on the surface.
The Cleaning Process, Room by Room
Work top to bottom, wet areas before dry, walls before floors. Cleaning residue from wall tiles falls onto the floor — clean the floor last and you only clean it once.
Tiles — walls and floor
Start with the wall tiles in the shower recess, then move to the remaining wall tiles, then the floor. Spray the wall tiles with a pH-neutral cleaner and let it sit for two to three minutes before wiping. Don’t scrub immediately — the dwell time does most of the work. Wipe down with a non-scratch pad and rinse thoroughly. Soap scum on ceramic or porcelain tiles responds well to diluted white vinegar. On natural stone — marble, travertine, limestone — skip the vinegar entirely. Acid-based solutions etch the surface and the damage is permanent.
Floor tiles need the same process but more attention to the grout lines. Bathroom floor grout sits horizontal and collects more contamination than wall grout. A stiff brush rather than a cloth makes a real difference here. Clean the floor last, starting from the furthest corner and working toward the door.
Frequency: Weekly wipe-down for most households. Full scrub with grout brush every two to four weeks.
Grout lines
Apply a grout cleaner or a paste made from bicarb soda and a small amount of water directly to the grout lines. Let it dwell for five minutes. Scrub with a stiff-bristle brush — an old toothbrush works fine for tight sections — and rinse thoroughly. For stubborn staining, a second application is more effective than scrubbing harder the first time.
Grout sealer reduces staining over time. How often it needs reapplying depends on the specific product used — check the data sheet for whatever was applied at installation rather than relying on a generic figure.
Watch for: Cracked grout at internal corners — where two walls meet, or where a wall meets the floor. Those corners should be silicone, not grout. Cracking grout at those junctions is a structural concern, not a cleaning problem. Don’t re-grout them.
Shower screens and glass
The highest-impact habit for shower screen maintenance is also the simplest: squeegee after every shower. It takes about thirty seconds and prevents the majority of soap scum and limescale buildup. Everything else is catching up on what the squeegee habit prevents.
For existing buildup, apply white vinegar or a purpose-made glass cleaner with a non-scratch pad. Let it dwell, then buff dry with a microfibre cloth. For heavier limescale deposits, a specialist limescale remover is worth the extra step. Don’t use abrasive pads or steel wool on glass. Scratches don’t come out.
Permanent water staining — mineral deposits etched into the glass surface — cannot be cleaned off. If a panel is at that stage, it needs replacing. Check the seal channel at the base of the screen periodically; mould there that returns quickly after cleaning can indicate the channel isn’t draining correctly.
Silicone sealant
Surface mould on silicone responds to a mould-specific fungicide applied and left to dwell per the product instructions, then scrubbed gently with an old toothbrush and rinsed. Mould that has penetrated into the silicone body — visible as black spots that remain after surface treatment — cannot be removed. That silicone needs to come out and be replaced.
While cleaning, inspect the silicone at the same time. Replace it if you see any of the following:
- Any section that has pulled away from the wall or floor surface
- Soft or spongy feeling in the wall where the silicone sits
- Silicone that has gone hard and lost its flexibility
Do not re-bead over existing silicone without removing the old bead first. The new bead won’t bond correctly and will fail faster than a fresh installation on clean substrate.
Toilet
Clean in order: cistern lid and exterior surfaces first, then the seat and hinge points, then the bowl last. Cleaning the bowl first and then handling exterior surfaces isn’t a good sequence.
Exterior surfaces: bathroom spray and a cloth. Pay attention to the base — the area where the toilet meets the floor collects dust and moisture and is frequently missed. Hinges: use an old toothbrush to reach the recesses around the hinge pins where limescale and mould accumulate. Bowl: apply toilet cleaner under the rim, let it dwell, scrub including under the rim lip, then flush.
If the toilet is running continuously, or the flush is inconsistent, that’s a plumbing issue. Cleaning it more thoroughly won’t change it.
Basin, tapware, and fixtures
Basin: non-abrasive spray, wipe, rinse. The two spots that get missed most often are the pop-up waste and the overflow opening. Both accumulate hair, soap residue, and biofilm — both are easy to clean with a cloth and a toothbrush. Worth doing monthly.
Tapware: dry off after use and you’ll avoid most limescale buildup. For existing scale, use a limescale remover appropriate to the finish — chrome is more tolerant; brushed nickel, matte black, and brass are not. Abrasive cleaners scratch chrome permanently and will damage other finishes faster.
Check the braided hose connections under the basin periodically. A slow drip from a supply line can go unnoticed for a long time and cause real damage to the cabinet underneath.
Exhaust fan and ventilation
The exhaust fan is the bathroom component most likely to be maintained the least and to have the biggest impact when it’s not working properly. Remove the grille cover, wash it with warm soapy water, dry it completely before reattaching. Dust buildup on the grille restricts airflow — a fan with a blocked grille is running but not doing much. Do not use water near the fan motor or housing.
Check that the fan is actually drawing air: hold a tissue near the grille with the fan running. If it barely moves, the fan isn’t performing. The most common causes are a blocked grille (solved by cleaning) or a fan that’s reached end of life. Exhaust fan replacement is a licensed electrician’s job and it’s not expensive.
Inadequate ventilation is the most common cause of surface mould in bathrooms that are otherwise structurally sound. A bathroom with no exhaust fan and no operable window has a ventilation problem that no cleaning schedule will resolve.
How Often to Clean Each Part of Your Bathroom
The frequency below is a starting point, not a fixed rule. A household of four sharing a single bathroom needs more frequent attention than a bathroom used occasionally. Water hardness in your area affects how quickly limescale builds; bathrooms in hard-water areas need more regular tapware and screen maintenance. Squeegee the shower screen after every use — that one habit reduces the frequency of everything else on the glass cleaning side.
When Cleaning Isn’t the Problem
A lot of bathroom maintenance problems aren’t maintenance problems. They look like one — mould on the grout, staining at the silicone, a persistent damp smell — but cleaning them away doesn’t fix what’s causing them. Understanding the difference matters, because the response to each is completely different.
Mould that comes back in the same spot
Surface mould that responds to cleaning and stays gone is a ventilation and moisture management issue. Better airflow and a consistent cleaning routine will control it.
Mould that returns within a week or two of cleaning — particularly at grout lines inside the shower recess — is a different situation. Persistent mould in a wet area often means there’s ongoing moisture behind the tile surface. A failed waterproofing membrane creates a constantly damp environment inside the wall that surface cleaning never reaches. Mould appearing on the ceiling of the room below a bathroom warrants immediate attention.
Cracked grout at internal corners
Wall-to-wall and wall-to-floor junctions in a wet area should be finished with silicone, not grout. Silicone accommodates natural building movement; grout is rigid and cracks. If those corners were grouted and the grout is now cracking or missing in sections, water has a direct path into the substrate.
Re-grouting those corners is not the right response. The corner needs to be cut back and finished with the correct silicone bead. Grout that sounds hollow when tapped, or that is lifting in sections, points to adhesion failure or substrate movement — neither is addressed by re-grouting.
Silicone that has separated from the substrate
A silicone bead that has pulled away from the wall or floor surface — even slightly — is an open water pathway into the substrate. In a shower recess, water enters that gap every time the shower is used. Re-beading over the top of separated silicone does not close that pathway. The existing silicone needs to come out, the substrate needs to be inspected, and a new bead needs to go onto a clean, dry surface.
Soft or spongy wall areas
Press gently on the wall around tap penetrations, around the shower arm, and around any fixture that passes through a tiled surface. The wall should feel solid. If it feels soft, spongy, or gives slightly under pressure, the substrate has absorbed water and the integrity of that section of wall is compromised. This doesn’t get better with cleaning.
Efflorescence on grout lines
White, chalky, crystalline deposits appearing on grout lines — particularly at the base of shower walls or at floor level — indicate water moving through the substrate, carrying dissolved minerals to the surface as it evaporates. It cannot be cleaned away permanently; it will return because the water carrying it is still moving through the substrate.
What connects all of these: they are waterproofing and substrate issues, not surface issues. The right response is an assessment by someone who can identify the extent of the problem — not more cleaning product.
Related: Wet area waterproofing requirements under AS 3740 — what the standard requires and how to identify when an installation doesn’t meet it. See our AS 3740 waterproofing compliance guide ›
What to Do If You’ve Found a Structural Issue
If the cleaning section is what you came for and everything looks fine, this section probably doesn’t apply to you. Move on.
If you’ve worked through the diagnostic section and found something — mould that returns, silicone that’s separated, a wall that gives under pressure — the path forward is different from the maintenance path. Cleaning a bathroom that has a failed waterproofing membrane or damaged substrate will not resolve the underlying problem. It may slow the visible symptoms for a while. It will not stop water moving through the wall or floor. And the longer water continues to move through a substrate unchecked, the more expensive the eventual repair becomes.
Surface mould, intact silicone, no structural indicators — the problem is ventilation. Address the airflow and clean consistently. No renovation required.
Any of the structural indicators above — get a licensed specialist to assess the wet area. That assessment will tell you whether the scope is targeted rectification or whether the installation has deteriorated to the point where a full renovation is the more cost-effective path.
Silicone separated from the substrate, or softness in the wall around penetrations — this needs repair, not monitoring. Leaving it and cleaning around it doesn’t stabilise it.
Lifestyle Bathrooms is a referral and connector service, not a licensed contractor. We don’t carry out renovation or rectification work. What we do is connect homeowners with vetted, licensed NSW specialists who do — and make sure that connection is grounded in a real understanding of the scope.
If your bathroom is showing structural signs — persistent wet-area mould, separating silicone, soft substrate, or water appearing where it shouldn’t — the right next step is a conversation with a licensed specialist, not another application of mould spray. Request a free consultation ›
Related: Full cost breakdown for bathroom renovation and rectification work in NSW — what each trade line should include. See our bathroom renovation cost guide ›
Common Questions About Bathroom Cleaning and Maintenance
A genuine deep clean — grout brush, silicone inspection, drain, screen, everything — once a month is the right cadence for most Australian households. Weekly maintenance cleans keep the visible surfaces in order between those. The risk of stretching the deep clean out too far isn’t just aesthetic: mould that gets a foothold in grout or silicone is harder to remove than mould that gets caught early. A bathroom used by four people every day needs more frequent attention than one used occasionally.
A mould-specific fungicide applied directly to the affected grout lines, left to dwell per the product instructions, then scrubbed with a stiff-bristle brush and rinsed. That process works for surface mould — mould that’s growing on the grout face.
What it doesn’t work for is mould driven by a moisture source behind the tile. If the same grout lines keep growing mould within a week or two of cleaning — particularly in the shower recess — the mould has a consistent moisture supply that a fungicide applied to the surface can’t reach. That’s a waterproofing assessment, not a cleaning problem.
Yes, if it’s surface mould. A mould fungicide, left to dwell, then scrubbed with an old toothbrush and rinsed will remove mould growing on the outside of the silicone bead.
No, if the mould has penetrated into the body of the silicone. You’ll recognise this by black spots that don’t shift after surface treatment — they’re inside the material. At that point the silicone needs to come out and be replaced. Re-beading over the top of affected silicone without removing the old bead will fail faster than a fresh installation on clean substrate.
Most grout discolouration is a cleaning problem. Soap scum, hard water, and residue from cleaning products all stain grout, and most of it responds to a proper clean with the right product. Grout that doesn’t improve after a genuine attempt may have absorbed staining permanently — re-grouting is the maintenance option in that case.
The threshold changes when the grout is cracking, hollow-sounding when tapped, or lifting in sections. Those are adhesion or substrate issues, not surface staining. Cracked grout at internal corners — wall-to-wall or wall-to-floor junctions — in a wet area is particularly significant, because those corners should be silicone, not grout. That’s not re-grouting territory. That’s an assessment.
Not always — and it’s worth being precise about this, because the two situations need different responses.
Mould on ceiling surfaces, upper wall areas, and surfaces outside the wet area is almost always a ventilation problem. A bathroom without adequate exhaust airflow will grow mould on surfaces that have no waterproofing issue at all. Improving ventilation will stop it.
Mould appearing at grout lines inside the shower recess, behind silicone beads at floor level, or at wall-to-floor junctions — particularly mould that returns quickly after cleaning — is a different situation. That pattern suggests moisture is moving through the wet area from behind the tile surface, which is a waterproofing concern. The location and behaviour of the mould are the distinguishing factors.
Maintenance handles surface and cosmetic issues: cleaning, sealing, replacing tapware, re-grouting sound tiles. Renovation becomes the right call when the underlying installation has deteriorated — failed waterproofing membrane, damaged substrate from water ingress, fixtures at end of life, or a layout that no longer functions for the household.
The signs that point toward renovation: mould returning at wet area junctions despite consistent cleaning, cracked grout at internal corners, silicone that’s separated from the substrate, soft wall areas around penetrations, or efflorescence appearing on grout lines. Any of those warrant a licensed assessment rather than a deeper clean. A licensed specialist can tell you whether you’re looking at targeted rectification or a full renovation — and what either of those actually involves for your specific bathroom. Request a free consultation ›