Yes, vinegar can kill mildew. Acetic acid in vinegar is effective against mildew spores. Apply white distilled vinegar directly to the affected area, let it sit for an hour, then scrub and rinse.
Understanding Mildew and Vinegar

Explanation of Mild Mildew
Mildew is a type of fungus commonly found in damp areas. It appears as a thin, superficial coating, often white or gray.
It grows on organic materials like paper, leather, and fabrics and on moist surfaces, including walls and ceilings.
Difference Between Mildew and Mold
While both mildew and mold are fungi, they differ in appearance and where they grow. Mildew usually looks powdery or fluffy, while mold tends to be thicker and comes in various colors.
Mold is often found in more permanent structures and can cause more damage than mildew.
Common Areas for Mildew Growth
Mildew thrives in moist, warm areas with poor ventilation. You might find it in bathrooms, kitchens, basements, or anywhere with condensation or water leaks.
Mildew loves to grow on shower curtains, window sills, and other damp surfaces.
Properties of Vinegar
Vinegar is a liquid made from the fermentation of ethanol. It’s known for its acetic acid content, which gives it its strong, sour taste and its cleaning powers.
Types of Vinegar and Their Acidity Levels
There are many types of vinegar, but white distilled vinegar is most often used for cleaning because of its high acidity level.
The acidity of vinegar, usually around 5%, is what makes it effective against mildew and other fungi.
How Vinegar’s Acidity Affects Mildew?
The acetic acid in vinegar can break down the structure of fungi like mildew. This makes it an excellent option for natural cleaning and mildew removal.
Scientific Studies on Vinegar as a Fungicide
Research has shown that vinegar can effectively kill many types of bacteria and viruses. Some studies suggest that it can also kill fungi, including mildew spores, making it a useful tool in the fight against mildew in homes.
How to Use Vinegar to Kill Mildew?

Safety Considerations Before Using Vinegar
Before you use vinegar to tackle mildew, make sure to wear protective gear like gloves and goggles.
Vinegar’s strong acidity can irritate your skin and eyes, so it’s essential to protect yourself.
Ventilation is Key
Because vinegar has a potent smell, ensure good ventilation in the area where you’re using it. Open windows or use a fan to help disperse the vinegar fumes.
Preparing the Vinegar Solution
To prepare your vinegar solution, you can use white distilled vinegar straight from the bottle. For some surfaces, you might want to dilute it with water.
Application Methods
You can apply vinegar to mildew by spraying it directly on the affected area or by using a sponge or brush to scrub it in. Make sure to cover the mildew completely with vinegar.
Duration for Vinegar to Act on Mildew
Let the vinegar sit on the mildew for at least an hour. This gives it enough time to break down the mildew spores. After an hour, scrub the area to remove the mildew and then rinse with water.
Tips for Preventing Mildew Regrowth
To keep mildew from coming back, it’s crucial to maintain a dry and ventilated environment.
Use dehumidifiers or fans, and regularly clean surfaces to prevent mildew spores from taking hold.
Limitations and Alternatives to Vinegar for Mildew Removal

Limitations of Vinegar as a Mildew Killer
While vinegar is effective against mildew, it’s not always the best choice for every surface.
Vinegar can damage natural stone, waxed wood, and certain types of grout. It’s also not as potent as some commercial mildew removers.
Effectiveness Compared to Commercial Removers
Commercial mildew removers may be more powerful than vinegar, especially for severe infestations.
However, vinegar is a safer, more natural option for regular maintenance and minor mildew problems.
Natural Alternatives to Vinegar
If vinegar isn’t suitable for the job, there are other natural options you can try. Baking soda, tea tree oil, and hydrogen peroxide are all known for their mildew-fighting abilities.
Professional Mildew Removal Services
For extensive mildew infestations or when dealing with valuable or delicate surfaces, it might be best to call in professional mildew removal services.
They have the expertise and equipment to safely and effectively remove mildew.
FAQs About Vinegar Killing Mildew
Can vinegar effectively kill mildew spores?
Yes, vinegar can effectively kill mildew spores due to the acetic acid it contains.
What type of vinegar should be used to kill mildew?
White distilled vinegar should be used to kill mildew.
How long should vinegar sit on the affected area to kill mildew?
Vinegar should sit on the affected area for at least an hour to effectively kill mildew.
Is it necessary to rinse off vinegar after applying it to mildew?
Yes, after letting the vinegar sit and scrubbing the area, it should be rinsed off.
Can I use any kind of vinegar for mildew, or does it have to be white distilled vinegar?
While other vinegars can have some effect, white distilled vinegar is recommended for killing mildew.
Final Thoughts
Vinegar is a potent ally in the fight against mildew. Its acetic acid content is what makes it effective in eradicating mildew spores.
For best results, apply white distilled vinegar directly to mildew, wait for an hour, then proceed to scrub and rinse the area thoroughly.