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Many of us invest a lot of expense into installing quality double glazing units in the hope that they will last for several years without needing to be replaced. Often, it’s our own maintenance efforts that prolong the life of our windows. Below, C2C’s technical expert, Louis, shares how to successfully maintain double-glazed windows.


how to maintain your double glazed windows


What should I use to clean my double glazing?

To clean the glass effectively, there are a few simple methods to get that streak-free shine. Here is our tried and tested technique:



  • Bowl
  • Distilled water
  • White vinegar
  • Microfibre cloth
  • Newspaper
  • Cotton buds or an old toothbrush


clean windows with newspaper



Combine one-part white vinegar to four parts water, then using the microfibre cloth, wipe the windows clean in a circular motion. Keep topping up your cloth with the cleaning mixture to remove as much grime as possible. Using the cotton buds or old toothbrush, really get into the nooks and crannies. Remember to keep dipping into the water and vinegar during this stage too.

Surprisingly, newspaper is a fantastic material for buffing windows to remove streaks for a clear view. You might want to don a pair of gloves for this part, as some of the newspaper print could transfer onto your hands.

If you don’t feel confident in mixing your own cleaning solution, you can buy a good quality brand, such as You or Karcher. Cloudy2Clear has its own specialist glass cleaner too – just contact your local branch today for more information.


Top tip

Make sure you clean your windows on a cloudy, dull day. Although it can be tempting to save this job for a sunny day, this means that your windows may dry too quickly, which can cause streaks.


how to maintain double glazing


Never use washing up liquid to clean your windows; this can damage the seals and cause them to wear down prematurely.


What not to use on the glass:

  • Bleach
  • White spirits
  • Methylated spirits
  • Nail varnish remover
  • Washing up liquid
  • WD40
  • Scouring pads
  • Too much pressure – if you have a particularly tough stain or mark, don’t try to force elbow grease into this. Using the right cleaning solution and warm water will easily removed the stain, without risk to your glass.


What should I look for with the gaskets and seals?

Check for lumps and bumps that have appeared in the seals. You can gently push any lumps back in, but if you are concerned that the problem is not disappearing, contact a professional.

Use an old toothbrush and hot water to gently clean – do not use anything that could potentially damage the seals, such as washing up liquid or scouring pads.


How do I stop mould from building up?

Condensation is a common issue and can cause mould to appear on your double glazing. To avoid or prevent this, there are a number of things you can do:

  • Remove moisture from your windows with a sponge or window cleaner tool
  • Don’t push furniture against walls
  • Keep your home well ventilated by opening windows and using extractor fans when cooking or showering
  • Insulate your home properly

You can read our more in depth article on this subject here.




How do I keep the hinges, locks, and mechanisms running smoothly?

It’s important that your windows and doors are in full working order, both for the safety and security of your home. Broken locks can make it easier for burglars to break in and stiff hinges or mechanisms can affect your escape in an emergency.

  • Keep hinges clean and clear of obstructions, such as a build-up of dirt
  • Use a light oil to ensure hinges work effectively (and don’t squeak!). WD40 is a good, all-rounder for any moving parts of your windows
  • Make sure sliding doors or windows have clean tracks to avoid sticking. You can use a wire brush to reduce any excess oil on the tracks

And don’t forget, if you notice anything unusual about your double glazed windows, doors or conservatories, such as moisture inside the panels, cloudy or misty panes, or anything else, contact your local Cloudy2Clear branch today to see if we can help you.


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