Foggy windows do more than dull your view. In commercial spaces, they cast a shadow on professionalism. At home, they dampen natural light and even signal deeper moisture problems. If you’ve tried the usual tricks and nothing works, this is the guide for you.

At Insight Service Solutions, we’ve restored clarity to thousands of windows across Winnipeg—from low-rise storefronts to high-rise towers. And now, we’re giving you five fixes that actually work. Let’s demystify the fog!

 

 

1. Identify the Type of Fog: Surface vs. Sealed In

Before jumping to cleaning solutions, it’s crucial to understand why your windows are foggy.

• Surface Fog: Usually due to temperature differences or humidity buildup on the interior or exterior side. These can be wiped clean.
• Seal Failure (Fog Between Panes): If your double-pane window has fog inside the glass, the seal is likely broken. No amount of Windex will fix this—you’ll need professional help.

Insight Fix: Try a basic fog test. Wipe both sides of the window. If the fog doesn’t disappear—it’s trapped. That’s when our High-Rise Window Cleaning or Facade Cleaning Services come into play.

Restore visibility with expert High-Rise Window Cleaning →

 

 

2. Use a DIY Vinegar-Based Cleaning Solution (For Surface Fog)

Forget harsh chemicals. One of the best ways to clean foggy windows naturally is this tried-and-true solution:

Mix:

• 1 cup distilled white vinegar
• 1 cup warm water
• A drop of dish soap

Spray it generously and use a microfiber cloth to wipe in circular motions. Vinegar cuts through mineral buildup and soap scum—common culprits behind hazy windows.

Pro Tip: Avoid paper towels. They leave lint and micro-scratches. Stick to a clean microfiber or squeegee.

For tougher buildup, sprinkle a little baking soda on the cloth before wiping. It adds gentle abrasion to remove stuck-on grime without damaging the glass.

Bonus Tip: If you're cleaning multiple large windows or storefront glass, section your work to avoid streaks—clean one area at a time and immediately dry it with a squeegee.

Need help beyond vinegar? Schedule a Commercial Window Cleaning →

 

 

3. Dehumidify Your Space (Because Moisture Is the Enemy)

If your windows keep fogging up, you’re not just dealing with dirt. You’re battling excess humidity.

• Use a dehumidifier in rooms prone to moisture (bathrooms, kitchens, laundry rooms).
• Ensure proper ventilation—especially if you manage a commercial property. This reduces the chance of mold and protects window integrity.

Additional Fixes:

• Crack open a window for airflow, especially after hot showers or while cooking.
• Install exhaust fans or check your HVAC system’s humidity controls.
• Keep furniture and blinds from blocking airflow near windows.

Did You Know? Buildings with poorly maintained HVAC systems often experience ongoing window fog and condensation issues, especially in transitional seasons like spring and fall.

Bonus: Reduced humidity means lower energy bills and fewer foggy mornings.

Protect your investment with regular Gutter Cleaning →

 

 

4. Inspect for Leaks and Broken Seals (Don’t Ignore This)

A foggy window might be telling you more than “clean me.” If fog returns no matter how often you wipe, check:

• Seal integrity on double-pane units
• Frame caulking for cracks or gaps
• Signs of condensation inside the glass

This kind of damage allows moisture to sneak in—creating permanent fog. The fix? Either re-seal or replace the glass. In high-traffic commercial spaces, this isn’t optional.

Expert Tip: Thermal imaging tools can help identify hidden leaks around frames. If your building manager hasn’t done a window audit in the last 2 years, now’s the time.

Request a professional inspection from our Rope Access team →

 

 

5. Make Window Cleaning a Regular Maintenance Habit

Here’s the truth: even the clearest window won’t stay clean without a plan.

• Clean windows at least twice a year—more often for high-traffic or exposed buildings.
• Use professional-grade tools: squeegees, extension poles, and eco-safe solutions.
• For multi-story buildings, don’t DIY. Let trained technicians handle it safely.

Why it Matters:

• Dirty windows can permanently etch or scratch when left untreated.
• Clients notice smudges and fog faster than you think—especially in glass-heavy office buildings and storefronts.
• Clean glass improves natural light, lowers electric bills, and increases curb appeal.

Case in Point: One Winnipeg property manager saw a 17% drop in heating costs after regular window and gutter maintenance improved insulation performance.

Book a seasonal Pressure Washing service →

 

 

Bonus: Invest in Window Upgrades for Long-Term Clarity

If your windows are decades old, it may be time to upgrade. Newer double- and triple-pane windows are better insulated, more energy efficient, and less likely to fog.

What to look for:

• Low-E glass coatings
• Argon gas fills
• Warm-edge spacers to reduce condensation buildup

Pro Insight: Even with upgraded windows, maintenance is key. Don’t let a premium product lose its edge to buildup or neglected frames.

If you’re managing a commercial property, this is one of the smartest upgrades you can make for long-term clarity and energy savings.

 

 

Q&A: How to Clean Foggy Windows

Q: How do I know if the fog is inside or outside the glass?
A: Wipe both sides. If it stays foggy, the issue is between the panes and likely due to a broken seal.

Q: Will replacing the window fix the fog?
A: Yes—if the fog is between the panes. A full replacement or sealed-unit replacement may be necessary.

Q: Can I prevent future fogging?
A: Yes! Maintain proper indoor humidity, clean regularly, and ensure proper insulation around your windows.

Q: Do I need a professional for this?
A: If your windows are hard to reach, part of a commercial building, or foggy between panes—yes. Professionals like Insight Service Solutions have the tools and training to restore clarity safely and effectively.

Q: Can foggy windows lead to health problems?
A: Yes—persistent condensation encourages mold growth, which can trigger allergies and respiratory issues.

Q: What’s the fastest way to clear fog in a pinch?
A: Use a hair dryer or defogging spray on the inside pane to quickly evaporate surface moisture. This is a temporary fix, not a permanent solution.

 

See the world clearly again!

Whether it’s your home, storefront, or high-rise office, clean windows send the right message. At Insight Service Solutions, we combine local expertise with professional-grade equipment to deliver spotless results, every time.

Learn more about our team →