How to Clean Tile and Grout in a Bathroom
Tiles are easy; grout is the hard part. The fix is a pH-neutral cleaner for the tile faces and a soft brush with a baking-soda paste for the grout lines. Here is the full routine for floors, walls and showers, plus how to beat mould and when to reseal.
Clean tiles with grubby grout still look dirty. That's the whole problem in a bathroom: the tile wipes up in seconds, but the grout lines soak up soap, dirt and moisture and hold onto them. So how do you get both looking fresh without wrecking either?
The answer is two tools for two jobs. A gentle cleaner keeps the tile faces bright, and a targeted paste plus a soft brush lifts staining out of the grout. Get the products wrong, though, and you can bleach coloured grout, etch natural stone, or scrub the grout until it crumbles.
Key takeaways
- Two jobs, two tools. A pH-neutral cleaner for tile faces, a baking-soda paste and soft brush for grout lines.
- Whiten grout safely with a baking soda and 3% hydrogen peroxide paste, or oxygen bleach. Skip chlorine bleach on coloured grout (Clean and Scentsible, 2025).
- Black spots are mould. Treat it, then fix the cause with ventilation and drying, and reseal, or it comes back within about 90 days in a shower.
- Know when to stop cleaning. Grout that's cracked, missing or keeps going mouldy needs regrouting, not more scrubbing.
Cleaning just the floor? Our guide to cleaning bathroom floor tiles covers the mopping routine in detail. This guide takes on the whole bathroom, grout included.
What's the fastest way to clean bathroom tile and grout?
Clean the tile, then target the grout. Wipe tile faces with a pH-neutral cleaner and warm water, which is safe for every surface including natural stone (Angi, 2025). Then run a soft brush along the grout lines, where most of the grime actually sits.
Work top to bottom in a shower or on a wall, so drips run onto surfaces you haven't cleaned yet. On floors, sweep first so grit doesn't scratch. The tile is the easy 80 percent; the grout is the 20 percent that makes the whole bathroom look clean or dirty.
Finish every clean the same way: rinse, then dry with a cloth or squeegee and let the room air out. Standing water is what feeds grout mould, so drying is not an optional extra. It's the step that keeps your work looking good for weeks instead of days.
How do you deep-clean stained or dirty grout?
For grout that's gone grey or yellow, a paste beats a spray. Here is the routine tile pros reach for, using a baking soda and hydrogen peroxide mix that lifts stains without harsh chlorine.
Pre-clean the surface
Wipe the tiles and grout with your neutral cleaner first, so you're treating stains, not surface dirt and soap film.
Mix the paste
Combine one part 3% hydrogen peroxide with two to three parts baking soda into a spreadable paste (Clean and Scentsible, 2025).
Apply to the grout lines
Spread the paste along the grout with an old toothbrush. Keep it on the grout, not sitting on polished or stone tile.
Let it dwell
Leave the paste for about 15 minutes. The oxygen release does the heavy lifting, so you scrub less and damage nothing.
Scrub gently
Work the lines with a soft brush. Never use wire brushes or metal picks; they gouge grout and make it soak up dirt faster.
Rinse and dry
Rinse thoroughly with clean water, then dry the area and ventilate. Reseal the grout once it's fully clean and dry.
One safety rule. Never mix hydrogen peroxide with bleach, or one cleaner with another. It can create dangerous fumes. Pick one method, rinse well, and switch products only after the surface is clean and dry.
How do you remove mould and mildew from shower grout?
Those black or pink specks in shower grout are mould, not just dirt. A baking soda and hydrogen peroxide paste, or an oxygen-bleach solution, kills and lifts most of it without the fumes of chlorine (D&G Flooring, 2025). Apply, let it dwell, scrub gently, then rinse.
Killing the mould is only half the job. If you don't fix the cause, it's back within weeks. In fact, cleaned grout that never gets resealed can regrow mould within about 90 days in a shower. Keep the area dry and airy, and reseal once it's clean.
Stop it coming back. Run the exhaust fan during and for 15 to 20 minutes after every shower, squeegee the walls, and leave the door ajar so grout can dry. Ventilation and drying prevent mould far better than any cleaner removes it.
Clean, whiten, seal or regrout: which do you need?
Not every grout problem is a cleaning problem. If scrubbing keeps failing, you may need to move up a step. Here is how to tell which fix your bathroom actually needs.
Clean
Grout is intact and just dirty. A paste or oxygen-bleach clean brings it back. Start here every time.
Whiten
Grout is clean but permanently stained or patchy. A grout pen or colour-seal refreshes the look.
Seal
Grout keeps staining or absorbing water. Reseal it so it repels moisture and stays cleaner longer.
Regrout
Grout is cracked, missing or mould keeps returning in the same spots. Rake it out and regrout.
The two-week test. If mould returns within a couple of weeks of a proper deep clean and reseal, the grout has usually failed and water is getting behind the tile. That's a regrouting job, and it's worth getting a tiler to check the waterproofing while they're at it.
How often should you clean and seal bathroom grout?
Grout rewards routine. A quick wipe stops build-up, and periodic sealing keeps water out. This simple schedule keeps a bathroom looking cared for.
Wipe and rinse
Clean tile faces with a pH-neutral cleaner and give grout a quick brush. Rinse and dry to stop grime setting in.
Deep-clean grout
Treat the grout lines with a baking-soda paste or oxygen bleach, dwell, scrub gently and rinse.
Reseal
Reapply grout or stone sealer. High-moisture showers sit at the shorter end of that range.
The water-bead test. Sprinkle a few drops of water on the grout. If it beads up, the seal is holding. If it soaks in and darkens the grout, it's time to reseal (Grout Medic, 2025).
Do different tiles and grout need different care?
Yes. The safe method changes with the material, and getting it wrong is how surfaces get damaged. Here's the quick split.
Ceramic, porcelain & cement grout
Tough and tolerant, so most cleaning methods are fair game.
- Neutral cleaner for daily tile care
- Baking-soda paste or oxygen bleach for grout
- Steam cleaning is fine on sound, sealed grout
- Still avoid wire brushes and heavy acids
Natural stone & coloured grout
Porous and easily marked, so these need a gentler hand.
- pH-neutral products only, never vinegar or lemon
- No chlorine bleach; it fades coloured grout
- No steam on unsealed natural stone; it can etch
- Seal regularly and dry spills quickly
Grout-cleaning mistakes to avoid
Most grout damage comes from the cleaning, not the wear. Keep to the left column and your grout stays intact for years.
Do
- Use a baking-soda paste or oxygen bleach
- Let the paste dwell, then brush gently
- Use soft brushes and old toothbrushes
- Rinse well, then dry and ventilate
- Reseal grout after a deep clean
- Regrout when it's cracked or crumbling
Avoid
- Chlorine bleach on coloured or delicate grout
- Vinegar and acids on stone and cement grout
- Mixing peroxide, bleach or other cleaners
- Wire brushes and metal scrapers on grout
- Steam cleaning unsealed natural stone
- Leaving grout wet and unsealed after cleaning
Grout beyond a clean, or ready for a fresh look?
If the grout keeps staining, cracking or growing mould, cleaning can only do so much. The WA Kajaria Ceramics team can advise on regrouting, sealing and waterproofing, or a brand-new tiled bathroom, with supply and professional installation across Perth and Western Australia.
Cleaning bathroom tile and grout: common questions
Can I use bleach on bathroom grout?
On white grout, chlorine bleach can work, but it's harsh and, over time, can corrode grout. On coloured or dark grout it fades the colour, so oxygen bleach or a baking-soda paste is safer. Never mix bleach with other cleaners (Clean and Scentsible, 2025).
What's the best homemade grout cleaner?
A paste of baking soda with 3% hydrogen peroxide, roughly one part peroxide to two or three parts soda. Spread it on, wait about 15 minutes, then scrub gently and rinse. Avoid vinegar on natural stone and cement grout, since acids wear them down.
How do I get mouldy shower grout clean again?
Apply a baking-soda-and-peroxide paste or oxygen bleach, let it dwell, scrub gently and rinse. Then fix the cause: cleaned grout can regrow mould within about 90 days if it's not resealed and the shower stays damp. Ventilate, dry and reseal.
Should I seal grout after cleaning it?
Yes. Sealing helps grout repel water and stains and slows mould, especially in showers. Most bathrooms benefit from resealing every 6 to 12 months. Use the water-bead test to check: if water soaks in rather than beading, it's time to reseal (Grout Medic, 2025).
Is steam cleaning safe for tile and grout?
On sealed ceramic or porcelain with sound grout, steam is an effective, chemical-free option that lifts soap scum and kills mould. But don't steam unsealed natural stone like marble or travertine; the heat and moisture can etch and damage it. Check the manufacturer's advice first.
References
- Clean and Scentsible. How to Clean Grout (baking soda, hydrogen peroxide, oxygen bleach). Retrieved 2026-07-21, cleanandscentsible.com
- D&G Flooring. Remove Mold from Grout: A Tile Pro's Cleaning Playbook. Retrieved 2026-07-21, dgfloors.com
- Grout Medic. Preventing Mold & Mildew in Grout: Cleaning and Sealing Tips. Retrieved 2026-07-21, groutmedicdenver.com
- Angi. What Is a Neutral pH Cleaner? Safe Cleaning for Natural Stone. Retrieved 2026-07-21, angi.com
