THE CONDENSATION PROBLEM - HERE ARE THE CAUSES AND CURES.

In most houses in winter, the inner surfaces of the windows are the coolest surfaces and condensation will usually occur there before it appears on other surfaces. When condensation becomes excessive the moisture load must be decreased or the ventilation rate increased. To reduce the moisture load, humidifiers should be cut off, automatic dryers vented, clothes drying indoors or other activities that produce unusually high quantities of moisture avoided, and the structure checked for other possible moisture sources. Ventilation is generally the most effective means available to the house-holder for reducing humidity and should be obtained by opening windows or operating exhaust fan as soon as significant window condensation appears. Author