Greasy windows are a common nuisance, whether in your car, home, or office. Grease and grime not only obscure visibility but can also make your spaces feel unkempt and neglected.
Thankfully, when given the correct tools and techniques, you can restore your windows and make them feel brand new. In this comprehensive guide, we’ll walk you through the most effective methods for cleaning greasy windows, the science behind grease removal, and tips for preventing future buildup.
Why Do Windows Get Greasy?
Understanding the causes of greasy windows can help you address the problem more effectively. Common sources of grease on windows include:
Cooking Residue: Kitchen windows are prone to grease splatters from frying or simmering food.
Fingerprints on the pane can be removed using a suitable window cleaning solution. Natural oils from our skin transfer easily onto glass surfaces.
Airborne Particles: Dust, smoke, and pollutants can combine with moisture to form a greasy film.
Vehicle Emissions: Car windows, especially windshields, often accumulate grease from road grime and exhaust fumes.
Pet Marks: Pets pressing their noses or paws against windows can leave behind oily smudges on dirty windows.
Best Methods for Cleaning Greasy Windows
To tackle grease effectively, you need the right approach and materials. Here our easy step-by-step guide to follow:
1. Prepare Your Cleaning Supplies
Gather the following items:
- A bucket of warm water is essential for your window cleaning process.
- Dishwashing liquid (preferably one that cuts through grease)
- White vinegar
- Microfibre cloths or lint-free paper towels
- A squeegee
- A spray bottle

2. Pre-wash to Remove Surface Dirt
Before targeting the grease, rinse the window pane to remove loose dirt and dust. Use a hose for outdoor windows or a damp microfibre cloth for indoor ones. This step prevents scratching the glass while using a window cleaner.
3. Mix a Cleaning Solution
Get a spray bottle and combine the following ingredients:
- 1 part white vinegar can be an effective cleaner for window cleaning.
- 1 part warm water can be used in your window cleaning solution.
- A few drops of dishwashing liquid
- Shake the bottle gently to mix.
4. Apply the Solution
Spray the window cleaning solution generously onto the greasy areas of the window. Allow it to sit for 2-3 minutes to break down the grease.
5. Wipe Away Grease
In order to life the grease, wipe the window in a circular motion using a microfibre. For stubborn spots, apply a small amount of undiluted white vinegar directly onto the cloth and rub the area.
6. Rinse and Dry
Rinse the window with clean water to remove any residue from the cleaning solution. Use a squeegee to dry the glass, starting at the top and working your way down. Wipe the squeegee blade with a cloth after each pass to avoid streaks while cleaning your windows.

Advanced Tips for Stubborn Grease
For particularly greasy windows, consider these additional methods:
Baking Soda Paste
- Mix baking soda with a small amount of water to create a paste.
- Apply the paste to greasy spots and scrub gently with a non-abrasive sponge.
- Rinse thoroughly and dry.
Isopropyl Alcohol
- Dampen a cloth with isopropyl alcohol.
- Rub the greasy area in a circular motion.
- Follow up with a standard cleaning solution to remove any residue.
Preventing Grease Buildup on Windows
Once your windows are sparkling clean, follow these tips to keep them grease-free:
Kitchen Windows: Use an exhaust fan while cooking to reduce grease particles in the air. Clean windows regularly to prevent buildup.
Car Windows: Wash your car frequently and avoid touching the windows with oily hands.
Indoor Windows: Encourage household members to avoid pressing their hands or faces against glass surfaces.
Protective Films: Consider applying a glass treatment product that creates a protective barrier, making it harder for grease to adhere to the surface.
Common Mistakes to Avoid
When cleaning greasy windows, steer clear of these pitfalls:
- Using abrasive tools can damage the glass while window cleaning. Steel wool or harsh scrubbers can scratch the glass.
- Skipping Rinsing: Residue from cleaning products can leave streaks if not rinsed off properly.
- Using Hot Water: Extremely hot water can damage certain types of glass or window seals.
- Ignoring Frames: Be sure to also wipe the window frames to ensure all the grease is gone.

Homemade vs Commercial Glass Cleaners
When tackling greasy windows, choosing the right cleaning solution can make a significant difference. Both homemade and supermarket window cleaners have their advantages, depending on your needs, preferences, and level of grease buildup.
DIY Window Cleaners
Homemade solutions are popular for their affordability and environmental benefits. These cleaners are often made with ingredients you already have at home, reducing waste and the need for chemical-based products.
Vinegar and washing up liquid help break down oils, making it an excellent choice for greasy surfaces. Mix with warm water and apply it with a sponge or cloth.
However, homemade glass cleaners may not always be strong enough for heavy grease or residue caused by prolonged buildup. They are best suited for light to moderate cleaning tasks.
Commercial Glass Cleaners
Window cleaning solutions are formulated to tackle tough grease and grime efficiently. Many products include surfactants and solvents designed specifically to cut through stubborn residues, leaving glass surfaces sparkling clean.
They often include streak-fighting agents, making them ideal for achieving a flawless finish. Some products are also multipurpose, allowing you to clean windows, mirrors, and other glass with ease.
However, they can be more expensive than DIY solutions and may contain chemicals that are less eco-friendly. Always check the label for eco-conscious or non-toxic options if this is a concern.
Overall, many homeowners find that having both options available provides the best flexibility to suit their cleaning needs.
Why Vinegar Works for Grease Removal
A popular choice for cleaning greasy windows is white vinegar due to its acidic nature. Vinegar contains acetic acid, which can cut through grease by breaking down the molecules, making it easier to wipe away with a glass cleaner.
Additionally, vinegar is non-toxic, eco-friendly, and safe for most glass. We recommend mixing equal parts vinegar and water.

When to Hire the Professionals
If your windows are constantly getting build up despite regular cleaning, it might indicate an underlying issue, such as poor ventilation or heavy exposure to pollutants. We recommend seeking a professional cleaning service for a more thorough solution.
Achieving Sparkling Windows
By understanding the causes of oil buildup and using this guide, you can remove grease in no time. Remember to clean regularly and take preventative measures to keep your windows looking their best.
If you’re managing a commercial space, like a restaurant kitchen or school cafeteria, the importance of maintaining clean, grease-free windows cannot be overstated. At All Clean London, we offer commercial window cleaning for businesses across London. Let us help you maintain a polished, welcoming environment for your staff and customers.