Does Windex Kill Mold and Mildew in 2023?

Windex is a popular household cleaning product manufactured by SC Johnson. It is primarily known for its ability to clean and shine glass surfaces, such as windows and mirrors. 

The cleaning solution is composed of several active ingredients that help remove dirt, grime, and stains from various surfaces.

The effectiveness of Windex as a glass cleaner is attributed to its active ingredients, which typically include ammonia, detergents, and various solvents. 

These components work together to break down and dissolve dirt and grease, leaving glass surfaces streak-free and crystal clear.

Does Windex Kill Mold

Does Windex Kill Mold?

While Windex is not specifically formulated as a mold cleaner, some people wonder if it can be used to tackle mold growth due to its effectiveness in removing stains and grime. 

The reality is that Windex is not designed as a mold-killing product, and its ability to eliminate mold is limited.

Mold has porous structures that root deep into surfaces, making it challenging to eradicate completely with general household cleaners. 

Windex’s active ingredients may have some impact on surface mold, but they are unlikely to penetrate deep enough to eliminate the entire mold colony.

Tips for Using Windex to Tackle Mold

Windex, a popular glass cleaner, can be effective in tackling surface mold when used correctly. However, it is essential to follow specific guidelines to maximize its effectiveness and ensure safety during the removal process. 

Here are some valuable tips for using Windex to tackle mold effectively:

Ventilation is Key: 

Mold removal often involves the use of cleaning products that emit fumes. Before you start the cleaning process, ensure the area is well-ventilated. 

Open windows and doors to allow fresh air to circulate and facilitate the dispersal of any potentially harmful fumes. If possible, use fans to increase airflow, preventing you from inhaling any chemical odors.

Wear Protective Gear: 

Safety should always be a top priority when dealing with mold and cleaning products. Before you start, put on protective gear to shield yourself from potential irritants. 

Wear gloves to protect your hands from direct contact with mold and cleaning agents. Additionally, use a mask or respirator to cover your nose and mouth, reducing the risk of inhaling mold spores and any fumes emitted by the cleaning product.

Test on Small Areas: 

Before applying Windex on larger areas infested with mold, it’s crucial to perform a test on a small, inconspicuous spot first. 

This test will help you determine whether the surface is compatible with Windex and if any adverse reactions, such as discoloration or damage, may occur. 

By conducting this preliminary test, you can avoid potential mishaps and ensure that the chosen cleaning method is suitable for the surface you intend to clean.

Repeated Applications are Often Necessary: 

Mold can be resilient, especially when it has been allowed to grow and spread. For better results, it may be necessary to apply Windex multiple times to the affected surface. 

Apply the Windex directly to the moldy area and let it sit for a few minutes to allow the active ingredients to work on breaking down the mold. 

Afterward, gently scrub the area using a soft brush or sponge to remove the mold. If the mold persists, repeat the process until the surface is free from mold growth.

Regular Cleaning Maintenance: 

After successfully removing mold with Windex, it’s essential to maintain a regular cleaning routine to prevent future mold growth. Keep the area clean and dry, addressing any sources of moisture promptly. 

Moisture is a significant factor in mold growth, and by eliminating it, you can significantly reduce the likelihood of mold returning.

Important Note: While Windex can be effective for surface mold removal, it may not be suitable for more extensive mold problems or mold growth in porous materials like drywall. 

In such cases, it’s best to seek professional help or use specialized mold removal products designed for those situations.

What Is The Best Chemical To Kill Mold?

Now, we will explore different mold-killing options and their effectiveness, allowing you to make an informed decision for your specific situation.

The Power of Natural Remedies: Natural remedies have gained popularity for their effectiveness in combating mold while being environmentally friendly. 

Vinegar, baking soda, and hydrogen peroxide are three such options that can be highly effective in mold removal.

Specialized Mold Cleaners: In stores, you can find specialized mold cleaners explicitly designed to address mold problems effectively. 

These cleaners are formulated to penetrate surfaces deeply and target mold at its source, making them a potent option for thorough mold removal.

No “One-Size-Fits-All” Solution: It’s important to note that there is no single “best” chemical for killing mold. The efficacy of different chemicals depends on various factors, such as the type of mold, the surface it’s growing on, and the extent of the infestation.

Bleach – Effective on Non-Porous Surfaces: Bleach is a common household cleaner known for its mold-killing properties. It can be effective on non-porous surfaces like tile or porcelain. 

However, its limitations become apparent when dealing with porous materials like wood or drywall, where mold can grow inside, making it less effective in such cases.

The Power of Ammonia: Ammonia is a potent antibacterial and antifungal agent, making it effective in penetrating grout and other porous surfaces where mold tends to hide. 

It is also more readily available than bleach and is generally considered less toxic, making it an appealing choice for those concerned about safety.

Consider Individual Safety Concerns: When choosing a mold-killing chemical, it’s essential to take into account individual safety concerns. 

Some people may prefer milder options like vinegar or hydrogen peroxide due to health or environmental considerations.

Vinegar – Natural and Effective: Vinegar, with its acidic properties, can be a natural and effective option for mold removal, particularly on non-porous surfaces.

Baking Soda’s Abrasive Nature: Baking soda’s abrasive nature and odor-absorbing properties make it a useful addition to your mold-fighting arsenal in certain situations.

Safer Alternative – Hydrogen Peroxide: Hydrogen peroxide serves as an effective mold killer and provides a safer alternative to harsh chemicals like bleach.


In conclusion, while Windex is a versatile household cleaner, it is not specifically formulated to kill mold. While it may help with surface mold, it is not the most effective solution for complete mold eradication. 

When dealing with mold issues, it’s crucial to use specialized mold cleaners or natural remedies and take preventive measures to reduce moisture in the house. 

If faced with extensive mold growth, seeking professional mold remediation services is the best course of action.

Frequently Asked Questions (FAQs)

What will Windex kill?

Windex is primarily a glass cleaner and may offer some assistance in removing surface mold. However, its effectiveness in killing mold is limited, especially when compared to other specialized mold cleaners or natural remedies like vinegar, hydrogen peroxide, and baking soda. Windex is more suitable for cleaning glass surfaces and may not be the most potent solution for complete mold removal.

What kills mold on glass?

For killing mold on glass surfaces, Windex can be somewhat effective due to its cleaning properties. However, if the mold is persistent or growing extensively, more powerful solutions might be necessary. Natural remedies like vinegar or hydrogen peroxide can also be used on glass surfaces and may provide better results in certain situations.

What products actually kill mold?

Several products are known to effectively kill mold. Common household bleach is a powerful mold killer, particularly on non-porous surfaces like tile or porcelain. Ammonia is another potent antibacterial and antifungal agent that can penetrate grout and porous surfaces where mold often hides. Additionally, natural remedies like vinegar, baking soda, and hydrogen peroxide can be effective and eco-friendly options for mold removal on various surfaces. Specialized mold cleaners available in stores are also designed to effectively eliminate mold at its roots.

When should you not use Windex?

Windex should not be solely relied upon in situations where extensive mold growth is present, especially on porous surfaces like wood or drywall. In such cases, more potent mold-killing solutions, like bleach or ammonia, may be more appropriate. Windex’s effectiveness is limited primarily to glass cleaning, and for thorough mold removal, other specialized mold cleaners or natural remedies should be considered.

Is Windex good for disinfecting?

Windex is not primarily designed as a disinfectant. While it may have some mild disinfecting properties due to its alcohol content, it is not as effective as dedicated disinfectants for killing bacteria and viruses. For proper disinfection, it is recommended to use disinfectant products specifically formulated for that purpose.

Kristen Park - Specialised Content Writer for Caresh Fresh

My name is Kristen Park and I am a senior writer specialising in how-to guides and home cleaning information at Cares Fresh. As a researcher, I take pride in digging deep to find every small detail on a topic and explaining it in a way that is easy for the reader to understand.