How to clean grout: tested methods that actually work

Why grout gets dirty (especially here)

Grout is porous. Those thin lines between your tiles act like a sponge, soaking up grease in the kitchen, soap scum in the shower, and moisture everywhere in between.

In Vancouver and across the Lower Mainland, the damp does not help. Long wet winters and steamy bathrooms give mould and mildew exactly what they love: moisture, warmth, and something porous to cling to.

The good news is that most grubby grout is not ruined. It is just holding onto build-up that the right method can lift. Let us walk through what actually works.

Before you start: safety first

Open a window or run the fan. You will be scrubbing in tight, damp spaces, and good ventilation keeps fumes down and helps surfaces dry after.

Never mix bleach with vinegar, ammonia, or other cleaners. That combination can release toxic gas. Pick one product, rinse well, and dry before you try anything else.

Always test your method on a small, hidden patch first, like a corner behind the toilet or under an appliance. Grout colour and tile finish can react in surprising ways, and a quiet test saves you a visible mistake.

Wear gloves. Even gentle cleaners are rough on hands after a full session of scrubbing.

Method 1: baking soda and water (the everyday workhorse)

For general grime and lightly discoloured grout, start simple. Mix baking soda with a little water into a thick paste.

Spread the paste along the grout lines and let it sit for ten to fifteen minutes. This softens the build-up so you are lifting dirt, not just pushing it around.

Scrub with a stiff nylon brush or an old toothbrush, working along the line rather than across it. Rinse with clean warm water and wipe dry.

This is the method to reach for most often. It is cheap, safe on most grout, and surprisingly effective when you stay patient with the scrubbing.

Method 2: a pH-neutral grout cleaner (for stubborn build-up)

When plain baking-soda paste is not enough, reach for a pH-neutral tile-and-grout cleaner made for the job rather than a household acid. Spray it on, give it a few minutes to work, then scrub along the lines with a soft nylon brush and rinse.

It is tempting to reach for white vinegar — you will see it recommended all over the internet. But acids are harder on tile than people realise: they etch natural stone (marble, travertine, slate) and can dull glazed ceramic and porcelain over time. Tile-industry guidance (ANSI A108 and the Tile Council of North America) is to follow the tile and grout manufacturer's cleaning recommendations, which for most glazed tile means avoiding acidic cleaners.

If your grout maker specifically okays an occasional diluted-vinegar rinse for your tile, use it sparingly and rinse thoroughly. When in doubt, a pH-neutral cleaner or the baking-soda paste from Method 1 is the safer choice.

Rinse well either way, so no residue is left behind to attract new dirt.

Method 3: tackling mould and mildew

Black or pink specks in shower grout are usually mould or mildew, and they are common in our climate. For coloured or white grout on ceramic and porcelain, a diluted oxygen-based cleaner or a small amount of diluted bleach can help lift the staining.

Apply, let it dwell for the time listed on the label, then scrub and rinse completely. Keep that window open and fan running the whole time.

Remember the golden rule: one product at a time, never bleach mixed with vinegar or ammonia. If you used vinegar earlier, rinse and dry fully before switching.

If mould keeps returning in the same spot, the real fix is drying the area. Squeegee the tiles after showers and run the fan for a while afterward. Grout that dries out quickly stays cleaner far longer.

Seal your grout when you are done

Clean grout is the perfect moment to protect it. A grout sealer soaks into those porous lines and creates a barrier that repels water, soap, and stains.

Let the grout dry fully first, usually a day after a deep clean. Then apply the sealer per the label, wipe away the excess, and let it cure.

In a damp climate, sealing is not fussy overkill. It genuinely slows down how fast build-up and mould take hold, which means less scrubbing for you down the road.

How often should you clean grout?

A quick wipe of shower and backsplash grout every week keeps build-up from setting in. This is the light maintenance that saves the big jobs.

Plan a proper scrub every two to three months for busy bathrooms and kitchens. High-moisture homes in the Lower Mainland may want to lean toward the shorter end.

Reseal grout roughly once a year, or whenever water stops beading on the surface. That is your simple signal the barrier has worn thin.

Consistency beats intensity. A little regular attention means you almost never face grout that has gone truly grim.

When to let MaidEX handle it

Sometimes grout is past a quick weekend fix. Years of build-up, deep soap scum, or mould that keeps creeping back can take hours of patient work and the right approach for your tile.

MaidEX deep cleans give tubs, showers, and tiled areas focused attention, including grout lines and soap-scum build-up that a standard tidy does not reach.

Our cleaners are insured and background-checked, and every clean comes with a satisfaction guarantee: if something is not right, we will re-clean it free within twenty-four hours.

If your grout has stopped responding to home methods, it is a fair time to book a deep clean and hand the scrubbing to someone else.