How to clean mould in the shower

Last updated: October 27, 2026 8:00:00 AM

Remove shower mould easily using simple household ingredients and a scrub brush. Follow these steps to keep your bathroom tiles and grout looking fresh.

To clean mould in the shower, start by applying a mixture of equal parts white vinegar and water to the affected areas, letting it sit for a few minutes before scrubbing and rinsing thoroughly. If the stains persist, apply a paste made from baking soda and water, scrub the surface gently with a stiff-bristle brush, and rinse the area clean with warm water.

Bathrooms trap moisture constantly, creating an environment where fungal spores flourish. Showers, with their warm water, soap residue, and lack of constant airflow, provide an ideal breeding ground. Dealing with this issue is a routine part of home maintenance. Addressing the problem requires the right preparation, proper cleaning techniques, and consistent habits to keep the microscopic spores from returning.

Gather Your Protective Gear and Tools

Before starting any cleaning process, protect yourself from airborne spores and harsh cleaning agents. Mould can irritate the respiratory system, eyes, and skin, especially when disturbed by scrubbing or chemical sprays.

Put on a pair of rubber or latex cleaning gloves to protect your hands. If the shower area lacks windows or ventilation fans, wear a protective face mask to avoid inhaling disturbed spores or strong fumes. Pull your hair back and wear old clothes that you do not mind getting wet or stained.

Next, collect the tools needed for the job. You will need a spray bottle, a sponge, a non-abrasive scrubbing pad, an old toothbrush for tight grout lines, microfiber cloths for drying, and a bucket of warm water. Having everything within reach saves time and prevents you from tracking moisture and grime across the house while searching for supplies. Check that your ventilation fan is switched on or that the bathroom door is propped open to let fresh air circulate throughout the space.

Prepare the Shower Surfaces

Before applying any cleaning solutions, clear the shower stall entirely. Remove shampoo bottles, soap dishes, razors, loofahs, and hanging caddies. Mould often hides underneath these items, so clearing the space ensures you can reach every affected surface.

Rinse down the walls and floor with warm water using a handheld showerhead or a bucket. This initial rinse washes away loose surface dirt, soap scum, and hair, allowing the cleaning agents to make direct contact with the fungal growth rather than sitting on top of bathroom grime.

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Apply the Vinegar Solution

Fill a spray bottle with ordinary white vinegar straight from the pantry, without diluting it with water for tough spots. Vinegar is a mild acid that breaks down the structural integrity of fungal growth, making it easier to lift from porous surfaces like grout and silicone sealant.

Spray the vinegar generously over all areas showing signs of dark spots, pink residue, or fuzzy patches. Pay close attention to corners, the lower edges of the walls where water pools, and the silicone caulking around the base of the tub or shower pan.

Allow the vinegar to sit undisturbed for a minimum of twenty minutes. During this time, the liquid penetrates the roots of the growth embedded in porous materials. Do not let the vinegar dry out completely; if the bathroom is very warm and the spray evaporates quickly, mist the area lightly with a little more vinegar to keep the surface wet while it works.

Scrub the Grout and Caulking

Take a stiff-bristle brush or an old toothbrush and begin scrubbing the areas where you applied the vinegar. Grout lines are notoriously difficult to clean because they are porous and uneven, trapping moisture and spores deep within microscopic crevices.

Scrub in gentle, circular motions along the tile lines. Apply firm pressure, but avoid scrubbing so hard that you gouge the soft grout or damage the silicone caulking, which can create more gaps for future moisture and spores to lodge inside. For broader flat surfaces of tile or acrylic walls, use a non-abrasive sponge or a scrubbing pad to loosen any remaining residue.

As you scrub, you should notice the dark spots lifting away from the surface. Periodically dip your brush into a bucket of clean water and wipe down the area to check your progress. If stubborn patches remain, move on to a stronger abrasive paste method rather than forcing the brush too hard against delicate bathroom fixtures.

Treat Stubborn Stains with Baking Soda

For persistent stains that survive the vinegar treatment, mix ordinary baking soda with a small amount of water in a small container until it forms a thick, spreadable paste. Baking soda acts as a mild abrasive that lifts stubborn discoloration without scratching porcelain, ceramic, or fiberglass.

Apply the paste directly onto the stubborn spots using a sponge or your gloved fingers. Press the paste firmly into grout lines and caulking seams where dark discoloration is deeply set. Let the mixture sit for ten to fifteen minutes.

Return with your stiff-bristle brush and scrub the pasted areas thoroughly. The combination of the abrasive texture of the baking soda and the mechanical action of the brush will help scour away the remaining discoloration. If the paste dries out too much, dab your brush in a little water to reactivate it as you work.

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Once all the scrubbing is complete, rinse the entire shower enclosure thoroughly. Use a bucket of clean, warm water or a handheld showerhead to wash away all traces of vinegar, baking soda, and loosened debris. Start from the highest points of the walls and work your way down to the drain, making sure no residue remains in the corners or on the fixtures.

After rinsing, take a dry microfiber cloth or a clean towel and wipe down every surface you just cleaned. Drying the shower immediately is a critical step that many people overlook. Leaving a freshly cleaned shower wet invites the spores floating in the air to settle right back into the damp environment.

Wipe the walls, fixtures, glass doors, and the floor until they are completely dry. If you have a squeegee, use it on the glass and tile to pull away the bulk of the moisture before following up with a cloth.

Maintain Daily Dryness to Prevent Return

Keeping the shower clean over the long term depends entirely on controlling the humidity levels in the bathroom. After every use, run the bathroom exhaust fan for at least twenty minutes. If your bathroom does not have an exhaust fan, leave the door wide open and crack a window to let the steam escape outside.

Keep a squeegee hanging inside the shower enclosure and make a habit of wiping down the walls and glass doors immediately after finishing your shower. This simple daily routine removes the standing water that mould needs to survive and multiply.

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