Condensation on your windows during the colder winter months is generally caused by too much moisture from inside of your house or home. This can be from a number of reasons like frequent showers, boiling water, humidifiers and a host of other appliances that are adding water into the atmosphere. Finding out where the excess moisture is coming from is the key to eliminating window condensation.
Don't lower the inside temperature of your home too low. Colder air cannot hold the moisture and it will condense on your windows.
Turn on your bathroom fans when you are running water, showering or bathing. Turn on your kitchen fan when you are boiling water in the kitchen.
Use a fan to circulate air flowing across the inside face of the window. This will speed evaporation and keep the water from condensing on the window surface. Do not have drapes or blinds closed on your window, they will impede the flow of warm air.
Open a window and turn a fan on during days when the temperature is not too cold. This will draw dry air from the outside in and push the moist air out.
Install ceiling fans in large open areas. This will push the warm air back down and across any large windows.
Wipe off moisture before the water leaks down inside your walls and causes mold. Eventually you will find a balance between comfortable humidity levels and too much moisture on your windows. Get a hygrometer and try to keep your humidity levels around 35-40 percent during the winter months. Hygrometers are instruments used for measuring humidity and are available at hardware stores and science stores.