How to prevent condensation in double-pane windows
One way to prevent condensation is to increase indoor air circulation. Every time you cook or shower, remember to turn on the kitchen or bathroom fan for at least 15–20 minutes. Use ceiling fans as well, even in winter. Set them to rotate in a clockwise direction, which will push warm air downward.
It’s also important to keep humidity inside your home in check. If you notice a humidity problem in your home, try a dehumidifier, which takes in air, sucks out the moisture, and releases it back into your home.
You can prevent condensation by simply keeping the windows open when the weather allows, which will release the warm, moist air trapped in the house.
How to get rid of condensation in double-pane windows
Unfortunately there’s no easy DIY fix for condensation in your windows. Essentially, the moist air will need to be replaced with dry air, and for that you’re going to need to bring in the big guns— hire a professional.
That said, you do have two options. A professional can evaluate the right solution.
1. Replace the window (or pane)
Because the dry air between the panes has been compromised, replacement of the window may be necessary.
You can save a considerable amount of money by replacing a single window pane instead of the whole window, though in cases of rotting, it may be best to replace the whole thing. A professional can evaluate whether a single pane replacement will do the trick.
2. Professional cleaning
As a less-invasive alternative, a glass professional can clean the window. The process entails drilling small holes at the top and bottom corners, spraying a cleaning solution through the top hole, and sucking it out through the bottom. An expert will then seal the holes with vent plugs, allowing air, water, and vapor to escape the window cavity freely.