Wiping the tiles with a premade solution of 10% bleach and 90% water should remove most of the mold (source). For particularly tough stains, try mixing a solution of 25% bleach and 75% baking soda in a cup. Always test the solution on a small section of your ceramic tile before you tackle the mold (source).
Mold is a type of fungi which is usually black in color. Mold will grow when there is moisture present in an environment with little or no sunlight. As mold grows best in damp, poorly ventilated areas, it will often be found in bathrooms.
Grease or fat-based stains: Wash the stain with club soda and water or with a non-abrasive floor cleaner. Ink or dye: Soak a clean cloth with diluted bleach and lay it over the stain. Let the cloth stay in place until the stain disappears. Rinse well.
For stubborn shower stains, soap scum and grime, mix one cup of warm water, two cups of white vinegar and one teaspoon of a vegetable-based dishwashing soap in a spray bottle. Spray the solution on the shower walls, let it work for 15 minutes and use a sponge to scrub off scum and grime.
In the spray bottle, mix two-tablespoons of Dawn with 1 cup of vinegar. Fill the rest with water. Spray the floor with the Dawn and vinegar mixture. Use the mop and gently scrub the tile.
Baking Soda and Hydrogen Peroxide
Create a paste that is one part hydrogen peroxide to two parts baking soda. Apply the paste and allow it to work its magic for at least 30 minutes. Now scrub with a sponge or nylon brush and rinse with warm water. This works wonders on red or black stains.
Hydrogen peroxide is great at whitening and brightening stained tiles and dirty grout. Combine half a cup of hydrogen peroxide with one gallon of hot water, then go to town on your flooring. Because it's so mild, it's safe for any floor type, and there's no need to rinse.
Hydrogen peroxide is particularly effective for cleaning coffee stains, nail polish, and blood stains on ceramic or finished tile. Hydrogen peroxide is a bleach-like chemical, so before you use any other cleaning sprays or solutions in the kitchen, wipe down the tiles thoroughly with water to remove any remnants.
To care for the tiles properly, always avoid: harsh chemicals, such as bleach and acid, including lemon and vinegar, for routine cleaning; these can cause damage to the tiles and grout if used regularly and are also health hazards as well as posing danger to other property near the tiles.
Remove mould: Pour some alcohol or vinegar onto a cleaning cloth and wipe it over the mould stains until they disappear. In the case of stubborn mould, you can leave the product to work for a little while. Then wipe the surface with clean water and dry it thoroughly.
It's a Fungus
Mould grows wherever dark, damp conditions go untouched. It doesn't take much moisture to encourage mould growth. The humidity and warmth in your shower are enough to make a nice home for black (or “toxic”) mould growth. You don't have to touch mould for it to affect your health.
Undiluted white vinegar in a spray bottle is the best all-around mold remover for shower grout. Spray the grout, and let the vinegar sit for at least one hour. Rinse with fresh water, and wipe down the walls. Use a stiff brush to remove challenging, stuck-on mold growth.
Avoid cleaning products that contain lemon, vinegar or other acidic substances. Do not use vinegar or chemicals on granite or marble tile floors. Instead, use a mild, pH-neutral cleaner that won't streak or discolor the tile.
You can safely use vinegar to clean ceramic or porcelain tiles, whether they are glazed or unglazed. For other types, however, like terracotta, marble or grante, we recommend you look for ph neutral cleaner that will not harm the material.
You can also use a mixture of baking soda and ammonia solutions which can be very useful in removing grime, dirt, and difficult-to-remove dirt. The use of such a mixture is also safe for the tiles.
Use Vinegar
Make a solution of an equal amount of vinegar and water. Store the solution in a spray bottle and sprinkle the solution on the bathroom tiles. Allow the solution to stay on the tiles for some time before scrubbing off the solution using a brush or sponge.
Vinegar and other acidic cleaners can stain them, etch the surface, and end up ruining their appearance, so steer clear of vinegar when you're cleaning them. This goes for all tiles made from cement or natural stone, including quartz, travertine, granite, marble, limestone, and slate tiles.
Make a mixture of baking soda and liquid soap using two parts baking soda with one part soap, with a bit of water. Vinegar is a non-toxic cleaner that kills mould and cleans bathroom tiles. Simply mix an equal amount of vinegar with water, and you have a non-toxic, effective cleaning solution.
Or, Let it Sit Some More…
About 15 to 20 minutes should be enough time for the hydrogen peroxide to let its brightening and whitening properties work. Then gently scrub away.
Combine equal parts white vinegar, rubbing alcohol and water, and then add ½ tsp. of liquid dish soap and a few drops of peppermint essential oils. This works well whether you use a bucket or spray bottle to dispense onto your floor as you mop. As an added bonus, peppermint oil deters ants and mice!
Don't mix hydrogen peroxide and vinegar together in the same mixture. This can create peracetic acid, which may be toxic and can irritate your throat and lungs, eyes and skin. You can, however, alternate spraying hydrogen peroxide and vinegar on a surface. Just make sure to wipe the surface between sprays.
Baking Soda and Vinegar
To get rid of soap or grout stains on your tiles, just add some water to the baking soda and make a thick paste. Apply this paste generously to your tiles. Add a few drops of vinegar to the paste to clean your tiles even more effectively. The paste will start to bubble.
When it's time to clean your floors, mix up a bleach and water solution, and let the power of Clorox get to work. Bleach works great on vinyl, nonporous tile and even grout. Safe around kids, pets & food.
Mildew is typically a gray, white, or light brown color and rests on the surface of a moist area. It has a powdery appearance and may be accompanied by a foul odor. Mold is usually black or green and has a fuzzy appearance and a distinctly musty smell.