How to Get Rid of Mold in the Shower — and Keep It Gone

Black spots creeping along the grout, pink film on the shower curtain, a musty smell that survives your morning clean — shower mold is one of the most common household problems, and one of the most stubborn. The good news is that most shower mold is a surface problem you can remove yourself in under an hour, with inexpensive supplies you probably already own. The harder part, and the part most guides skip, is stopping it from coming back next month.

This guide walks you through exactly how to get rid of mold in the shower safely: how to tell surface mold from a deeper problem, which cleaner to use on tiles, grout, sealant, and curtains, a step-by-step cleaning method that actually works, and the ventilation and drying routine that keeps a shower mold-free for months. You will also learn when mold is a sign of a leak or a job for a professional, so you never waste a weekend scrubbing a symptom while the cause keeps growing behind the wall.

Why Mold Loves Your Shower

Mold needs only three things to grow: moisture, warmth, and something organic to feed on. A shower supplies all three in abundance. Every shower leaves walls, grout, and sealant wet for hours, bathroom temperatures stay warm, and soap scum, shampoo residue, and dead skin cells provide a constant food source. Grout is especially vulnerable because it is porous: it absorbs water and holds it long after tiles have dried, giving mold spores a damp, sheltered home.

That is why mold almost always appears first in the same places: the grout lines at the bottom of the walls, the corners where walls meet the tray or tub, the sealant around the shower door or bath edge, and the folds of a shower curtain. Pink or orange slime, often mistaken for mold, is usually a bacteria called Serratia marcescens, which feeds on soap residue and is removed the same way. Black, green, or grey spots are true mold, and the darker and more widespread they are, the longer they have been growing undisturbed.

First: Is This a DIY Job or a Professional One?

Before scrubbing, take two minutes to assess the scale. Surface mold on tiles, grout, and sealant, covering less than about one square metre in total, is a safe DIY job for a healthy adult with gloves, eye protection, and ventilation. You can proceed with the method below. Stop and call a professional if the mold covers a large area, if sealant or grout is soft, crumbling, or pulling away from the wall, if tiles feel loose or the wall behind them feels soft or swollen, or if there is a persistent damp patch on the wall or ceiling on the other side of the shower. Those signs can mean water is leaking behind the tiles, and cleaning the surface will not fix the source.

People with asthma, severe allergies, or a weakened immune system should avoid scrubbing mold themselves, because scrubbing releases spores into the air. In that case, ask someone else to do the cleaning, or hire a cleaner, and leave the room ventilated for an hour afterwards. Keep children and pets out of the bathroom while you work, and never dry-scrub mold — always wet the area first so spores stay contained rather than becoming airborne.

Choose Your Cleaner: Vinegar, Baking Soda, or Bleach

Three cleaners cover almost every shower mold job, and choosing the right one saves effort. White vinegar is the best everyday choice: undiluted vinegar kills about 80 percent of mold species on non-porous surfaces, is cheap, and is safe for tiles and most grout. Spray it on, leave it for an hour, scrub, and rinse. It will not bleach stained grout back to white, but it will kill the mold. Baking soda paste — three parts baking soda to one part water — is mildly abrasive and excellent for scrubbing grout lines without damaging them, and it deodorises at the same time.

Household bleach is the heavy option for stubborn black staining on grout and sealant. Mix one part bleach to ten parts water, apply with a brush, leave for ten minutes, scrub, and rinse thoroughly. Bleach kills surface mold and whitens staining, but it does not penetrate porous grout well, so mold inside deep grout can return. It also produces strong fumes, so ventilation and gloves are essential. Never mix bleach with vinegar, ammonia, or any other cleaner: bleach plus vinegar creates chlorine gas, and bleach plus ammonia creates toxic chloramine gas. Use one cleaner, rinse fully, and only then switch to another if needed. Avoid bleach on coloured grout and natural stone, which it can discolour or damage; vinegar and baking soda are safer there.

Step-by-Step: Cleaning Mold From Tiles and Grout

Gather your supplies first: rubber gloves, eye protection, an old toothbrush or stiff grout brush, a spray bottle, white vinegar, baking soda, and old towels. Open the window if there is one and switch the extractor fan on. Wet the moldy area lightly with water to keep spores down, then spray undiluted white vinegar generously over tiles, grout, and sealant, and leave it for a full hour. This dwell time matters — spraying and immediately scrubbing removes the visible mold but leaves roots in the grout alive.

After the hour, make a baking soda paste and work it into the grout lines with the brush, using short, firm strokes along each line rather than circles, which spread paste everywhere. For sealant, use a soft cloth or the toothbrush gently — aggressive scrubbing tears old sealant and creates new gaps for water. Rinse everything with hot water, then dry the area with an old towel and leave the fan running. If black staining remains in the grout after drying, repeat the vinegar treatment once, or spot-treat with the diluted bleach solution for ten minutes, rinse well, and dry again. Two passes remove the vast majority of shower mold; a third pass with no improvement usually means the grout itself is permanently stained and needs recolouring or replacement, not more scrubbing.

Cleaning the Shower Curtain, Door, and Drain

Shower curtains and liners deserve their own treatment, because mold hides in their folds and bottom hems. A fabric curtain can usually go in the washing machine on a warm cycle with 120 millilitres of vinegar added to the rinse, then hung to dry fully before rehanging. A plastic liner with heavy mold is often cheaper to replace than to rescue — a new liner costs a few pounds or dollars, while a deeply moldy one will re-spot within weeks. Wipe shower door tracks and hinges with vinegar and a brush, since standing water collects there unnoticed.

The drain area is another overlooked mold harbour. Hair and soap build up around the drain cover, trapping moisture and feeding mold. Remove the cover, clear out hair and debris, scrub the cover and surround with vinegar and baking soda, and rinse. If water drains slowly, that standing water is feeding mold and needs attention in its own right — our guide on how to unclog a shower drain covers the safe methods, from a drain snake to an enzyme cleaner, without the pipe damage harsh chemical drain cleaners can cause.

When Grout or Sealant Must Be Replaced

Sometimes cleaning is not enough, and recognising that saves repeated frustration. Replace sealant if it is cracked, peeling, mouldy all the way through, or pulling away from the tile or tray — water is getting behind it, and no surface cleaner will fix that. Removing old sealant is straightforward: cut it out with a sealant remover tool or a sharp utility knife, clean and dry the joint completely, then apply a new bead of bathroom-grade silicone sealant and smooth it with a wet finger or tool. Leave it to cure for 24 hours before showering.

Grout that stays black after two thorough cleanings, or that crumbles when brushed, should be raked out and regrouted, or at least recoloured with a grout colourant and sealer. Sealing grout after cleaning or regrouting is one of the best long-term investments against mold: a grout sealer fills the pores that absorb water, so future mold has far less to grip. Reapply sealer once a year in a heavily used shower. Our detailed guide to how to clean grout covers the full range of grout tools and techniques, including steam cleaning, for floors and walls beyond the shower.

Keeping Mold Away: The 5-Minute Daily Routine

Prevention is mostly about drying, and drying is mostly about habit. After every shower, squeegee the walls and door, shake out the shower curtain so it hangs fully spread, and leave the extractor fan running for 20 to 30 minutes — a fan timer or a humidistat fan that runs until humidity drops makes this automatic. Leave the bathroom door ajar after showering if the layout allows, so moist air escapes instead of condensing on cool tiles. Once a week, spray grout lines and sealant with vinegar, leave for ten minutes, and rinse — a five-minute habit that stops mold before it becomes visible.

Storage habits help too. Bottles and sponges left on the shower floor trap water underneath them and grow mold rings that are easy to miss. Use a hanging caddy or a wall-mounted shelf that drains, and wipe underneath stored items weekly. In a small bathroom, good storage is also good mold prevention, because clutter blocks airflow and hides damp corners — see our bathroom storage ideas for small bathrooms for caddies, shelves, and over-door racks that keep the shower area open and dry. Finally, wash the shower curtain monthly and replace a plastic liner every few months; a fresh liner is cheaper than a mold problem.

Frequently Asked Questions