Open windows for 20 to 30 minutes. A stuffy home has a high level of humidity and increases the amount of condensation on the windows. Airing out your home for a brief period dispels some of the moisture in the air by allow cool air in.
Adjust your humidifier's setting. A portable or furnance humidifier set too high increases moisture in the air and causes window condensation. Lower the humidifier to 30 to 50 percent humidity to balance the amount of moisture in your home and prevent mold growth.
Operate a portable dehumidifier in rooms that have window condensation. A dehumidifier absorbs moisture from the air to make the environment drier and eliminates moisture that causes "sweating" windows.
Turn on your central air unit's ventilation fan. The fan pushes air throughout your home to evenly distribute moisture and prevents moisture from accumulating in a specific room. Run the ventilation fan for no more than one or two hours a day to prevent spikes in your electricity usage.
Avoid over-watering plants. Plants need regular watering to survive, but overwatering increases the amount of moisture in your home, which can also cause window condensation.