Windows steam up due to condensation, which happens when warm, moist air meets a cold surface. To stop windows from steaming up, improve ventilation by using exhaust fans, dehumidifiers, or opening windows. You can also apply anti-condensation treatments on the glass or upgrade to double-pane windows to reduce the chances of condensation buildup.

To prevent windows from steaming up, reduce humidity levels by improving ventilation or using a dehumidifier. Applying anti-condensation treatments to the glass and upgrading to double-pane windows can also help minimize moisture buildup.