Condensation on Windows
Condensation on windows is often caused by humidity that is too high. If you have a humidifier in your home, turn it down or off. Clothes dryers should be vented to the outside. When cooking with a large quantity of water, turn on an exhaust fan or open a window. Do the same after bathing or showering. Fans should be vented to the outside. When opening the window, just a few minutes is all it takes.
Sometimes the window itself needs to have some work done. It might need a storm window or a double or triple pane of glass. Leaks of air around the window should be sealed. Heavy draperies that are closed most of the time can restrict air circulation around windows and increase condensation on the windows. Open draperies or use lighter - weight curtains to increase air flow.
Heating equipment that is not properly vented can increase humidity in the air and cause condensation on windows. Do not use unvented combustion space heaters, such as kerosene space heaters, inside the house. Check other heating equipment to make sure it is vented properly.