Prep first
Before you start
- Find the cause before you pick a method, since where the mark sits and how it appeared decide the treatment.
- Start with the gentlest method and move up only if the stain is still there.
- Check whether the grout is cement or epoxy before choosing a cleaner.
Brown marks in grout usually come from rust or iron in water, tannins from coffee, tea or fruit, or a sugary spill that dried out of sight and oxidized. Whether the grout is cement or epoxy changes what you can expect, since stains become part of cement grout while epoxy can be cleaned back to its original color. Fresh marks usually come out with warm water and a scrub, but old stains in cement grout may never fully disappear.
Brown marks in grout that ignore a scrub often respond to a mild tile and grout cleaner left on for a few minutes. Then lift the solution with a mop or wet vacuum and rinse with clean water. If the color keeps returning after two rounds, bring in a tile professional instead of adding more force.
Before you start
What grout can take
Safe to use4
- Water
- Hot water
- Enzyme cleaners
- Heat, once the stain is out
Use with care5
- Soaking
- Chlorine bleach
- Solvents (alcohol, spot removers)
- Acids (vinegar, lemon)
- Scrubbing and abrasives
6 items
What you'll need
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- Warm waterLoosens a fresh mark before any cleaner goes on.
- White nylon scrub padNylon pads and brushes are the recommended tools for grout. (opens Amazon)
- Soft nylon brushWorks the cleaner into the joint without marring the surface. (opens Amazon)
- Tile and grout cleanerA mild, purpose-made cleaner for the part of the mark that won't lift with water. (opens Amazon)
- Paper towels or a clean clothWipes up the spill before it dries in. (opens Amazon)
- Mop or wet vacuumPicks up the dirty solution before it dries. (opens Amazon)
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6 steps
Step by step
Step 1 of 6
Wipe up any fresh spill
Blot the spill with a paper towel or cloth as soon as you see it, before it can dry into the grout. Work from the edge toward the middle so the liquid doesn't spread across the joints.
Step 2 of 6
Test the cleaner on a hidden spot
Before anything goes on the visible mark, apply the cleaner you plan to use to a small, out-of-sight section of grout. Let it dry, then check the color and the grout's surface.
Tip. If the test area changes color, stop and try a different approach.
Step 3 of 6
Scrub with warm water and a nylon pad
Dampen the mark with warm water and scrub it with a white nylon pad for at least 60 seconds. Keep the pad moving along the joint so you lift the soil rather than pushing it deeper.
Step 4 of 6A few minutes
Apply a tile and grout cleaner
If the mark is still there, apply a mild cleaner made for tile and grout and let it sit for a few minutes. Agitate it into the joint with a soft nylon brush or pad while it works.
Careful. Don't let the cleaner dry on the grout.
Step 5 of 6
Lift the solution before it dries
Pick up the dirty solution with a mop or wet vacuum before it dries, then rinse the area with clean water. Let the grout dry completely so you can see what the mark has become.
Careful. Leftover cleaner leaves a sticky film that attracts dirt, so rinse until the film is gone.
Step 6 of 6
Check the grout once it's dry
Look at the mark in good light once the grout is fully dry. If it has lightened but is still visible, go back to the cleaner and scrub once more; if it hasn't changed, it's a set-in stain and the set-in section applies.
If you'd rather buy than mix
Best products for brown stains on grout
Choose a cleaner labeled for tile and grout, and check that it suits your grout type, cement or epoxy, before you buy.
Zep Grout Cleaner & Brightener
How we picked these: each product is made for this type of stain, its maker doesn't warn against using it on grout, and its directions fit the steps above.
Finished the steps? How does it look?
Nice work. Let it dry completely and check it again in good light. Here is what done looks like:
How to tell it's really gone →A faint mark usually needs one more round, not a stronger product.
Heavy buildup usually takes more than one round.
Heavy or long-standing buildup →When to call a professional →How to tell it's working
Brown grout that is clearing looks lighter and more even each time you rinse, and the color of the grout shows through as the film lifts. If the mark stops changing after two rounds, it has set in, and the set-in section is the next step.
What changes for yours
Adjust for your grout
Greasy grout
Cooking grease and hand oils often sit in the grout and hold the brown on top, so the mild cleaner may not be enough. For greasy marks, use an alkaline cleaner made for tile and grout instead: dampen the grout, let it dwell 3 to 4 minutes, scrub, rinse, and repeat if needed.
Two rounds is usually the limit. If the grout still looks dark after that, the mark has probably set, and the set-in section applies.
Sealed cement grout
Sealed cement grout is where the wrong cleaner does the most damage. General cleaners break down the sealer, so lemon juice and all-purpose bathroom sprays are off the list. Strong alkaline, acidic, abrasive or ammonia-based cleaners can also cut the sealer's stain repellency, so stick with the tile and grout cleaner from the steps.
After the stain is gone, check the sealer, since a worn sealer is what lets the next stain in. If it looks thin, ask the grout maker which resealer suits your grout.
Epoxy grout
Epoxy grout is the more forgiving kind, and its color can always be cleaned back to the original. Hot water is fine for routine care: damp-mop with clean hot water, then rinse with hot water.
For tough soil, a bleaching cleanser is an option on epoxy grout only, and only after you've ruled out rust or iron. Scrub with a white nylon pad and rinse well afterward.
Rust-colored grout
Orange-brown marks that look rusty usually come from iron in the water, so they're the one brown mark where bleach is the wrong first move. Start with the steps above, since they're the gentlest option.
Commercial rust removers are acids, so they're a last resort on cement grout. Check with the grout maker before using one, and keep them off porcelain and enamel finishes nearby.
Water stains through paint
If the brown is a water stain that has bled through paint on the wall beside the tile, cleaning the grout won't reach it. Fix the source of the water first, then seal the stain with a stain-blocking primer before you repaint.
Painting over it without those two steps only hides the mark until it comes back. The walls guide covers the full repair.
Heavy or long-standing buildup
An old brown mark has had time to work into the grout, so the first round often only lightens it. On cement grout, the stain becomes part of the grout itself, which is why a mark that has been there for months can look permanent.
Once the mark has dried in, give it a longer treatment: let the tile and grout cleaner dwell for up to 10 minutes, then scrub and rinse as before. Keep the longer soak for this stubborn case only, and work over it with a soft nylon brush rather than a harder tool.
If it's still there after that, pressurized steam can lift some stains that resist conventional cleaners, so it's the next option. Stop when the steam stops changing the mark, and accept that some old brown marks won't come out; a professional can then advise whether regrouting is worth it.
Vinegar, baking soda, peroxide and more
Do home remedies work on brown stains on grout?
Plenty of kitchen remedies circulate for brown marks, and most of them don't belong on grout. The steps above cover what works, so you can skip the rest.
Skip5Avoid1
What makes it worse
Mistakes to avoid
Don't use chlorine bleach on brown grout
Bleach sets rust and iron, and it can intensify other brown marks, so it makes them harder to remove. Until you're sure the mark isn't rust or iron, keep chlorine bleach away from it.
Don't mix bleach with ammonia or rust removers
Bleach mixed with ammonia forms a toxic gas. Rust removers are acids, so they should never be used with chlorine bleach.
Don't use strong acid on the grout
Strong acid solutions make grout lose its color or turn powdery and sandy, and they dull glazed tile. Cement grout is alkaline, so the milder cleaner from the steps is the safer choice.
Don't use oil or wax cleaners on grout
Oil- and wax-based cleaners leave a film in the grout that holds dirt. Stick to the water-based tile and grout cleaner from the steps instead.
When to call a professional
Acid cleaning is the one job that really calls for a professional, because it takes extreme care. If a deeply set mark survives steam, contact the grout manufacturer's technical support for advice on your grout type. A professional grout cleaner can also tell you whether the grout can be lifted or needs replacing.
Questions
How do you remove brown stains from grout?
Start with the simplest fix: a warm water scrub with a white nylon pad, which is where the steps begin. Only move to a mild tile and grout cleaner if the mark survives that, and clear away the cleaner before it dries.
How long should a cleaner sit on grout?
A mild tile and grout cleaner needs only a few minutes, and an alkaline cleaner on greasy soil needs 3 to 4 minutes. A longer soak of up to 10 minutes is only for set-in marks.
Is epoxy grout easier to clean than cement grout?
Yes, epoxy grout is the more forgiving of the two. Its color can always be cleaned back to the original, and it can take hot water for routine care.
Will brown stains on grout come out for good?
Some will not. On cement grout the stain becomes part of the grout itself, so an old mark may only lighten, and severe scorch is permanent damage.
Why does the brown mark come back after cleaning?
Usually the stain didn't fully lift, or the source is still active, such as iron in the water. Fix the source before you clean again, or the mark will return.
Can you use steam on grout?
Yes. Pressurized steam can clean some stains that don't respond to conventional cleaners, so try it after the steps have stopped working.
Brown Stains on other materials
Other stains on grout
Start from the bigger picture
How we know this
Every method, amount and warning here comes from university extension services, industry bodies and product makers. We read them, check every step for unsafe combinations and changed amounts, and write it up so you can follow it.