No More Misty Mornings: How to Demist Your Double Glazing

Foggy windows ruining your view? If you’ve woken up on a chilly morning to find your double glazing looking more like frosted glass, you’re not alone. Misty windows are a common complaint – but the good news is, there are simple steps you can take to fix and prevent the problem.

At Colne Valley Windows, we know that keeping your home warm, clear, and energy-efficient matters. That’s why we’ve pulled together this no-nonsense guide to demisting double glazing and reclaiming your view.

Step 1: Understand What’s Causing the Mist

Condensation happens when warm, moist air hits a cooler surface – like your windowpanes. If the mist is on the inside, it’s likely due to humidity in your home. If it’s between the panes, you might have a failed seal – and that’s a different fix.

Start by figuring out where the fog is forming:

• Inner surface? It’s your indoor air causing it. Check the Energy Trust for causes.
• Between the panes? That usually means the unit has failed, and it’s time to consider a replacement.

Step 2: Improve Ventilation

Fresh air is your friend. Even in winter, cracking open windows for 10–15 minutes a day can make a big difference.

Other easy wins:

• Use extractor fans in bathrooms and kitchens.
• Avoid drying clothes indoors if possible.
• Keep lids on pans when cooking.

Less moisture in the air = less condensation on your glass.

Step 3: Dehumidify

A dehumidifier can work wonders, especially in homes that tend to trap moisture. These clever machines pull excess water from the air, helping to maintain a healthy humidity level – and keep your windows clear.

It’s an investment that can also reduce damp, mould, and that ‘sticky’ feeling in the air.

Step 4: Clean Your Windows (Yes, Really)

Sometimes, what looks like mist is just a build-up of grime. Dust, pollution, and general muck can cling to glass and make it appear foggy – especially in high-moisture areas.

Use a soft cloth and a good-quality glass cleaner and give your windows a regular once-over. Avoid abrasive sponges that can scratch the surface or damage the frames.

 

Step 5: Try a Demister Pad

For a more permanent fix, demister pads are a low-cost gadget that stick onto the glass and gently warm it, stopping condensation from forming in the first place. They’re commonly used in bathrooms but can be used in other areas too – especially where misting is frequent.

Step 6: Know When It’s Time to Replace

If the condensation is inside the sealed unit, unfortunately, cleaning won’t help. The airtight seal has likely failed, and the insulating gas between the panes has escaped – making the window much less energy efficient.

This is where we come in. At Colne Valley Windows, we replace failed double glazing units quickly and professionally, restoring your clear view – and the thermal performance of your windows.

A Clearer Outlook

While misty windows can be a nuisance, they’re not usually a cause for panic. With a few simple changes – from improving airflow to upgrading to a new unit – you can keep your home comfortable, efficient, and clear all year round.

Need expert help or advice? Get in touch with the Colne Valley Windows team today – we’re always happy to chat windows!