Moisture
You can prevent moisture from forming inside the glass by using a silica gel or moisture absorber inside the car. These products help to reduce humidity, preventing the condensation from forming. Additionally, cracking a window open slightly can help to allow some air circulation, reducing moisture buildup.
To prevent moisture from forming on the inside of the glass on cold days, you can crack a window open slightly to allow for air circulation, use a moisture-absorbing product such as silica gel or a dehumidifier in the car, or place a towel or cloth on the dashboard to trap excess moisture.
Car windows may get wet from the inside during rain due to condensation. When warm, moist air inside the car comes into contact with the cooler windows, the air cools and releases its moisture as water droplets on the glass. Proper ventilation can help reduce condensation by allowing the moist air to escape and the inside of the windows to reach a similar temperature to the outside.
make sure the moisture is out of the air, turn on your air conditioning with full heat, if no ac then u need some way to absorb the moisture, try collecting those packets from beef jerky packages
Check the inside of the distributor cap. Moisture there will prevent an engine from running. Note that YOUR problem may be something else, but you can start by checking there.
Mold can build up inside cars due to excessive moisture, which can come from sources like water leaks, wet or damp upholstery, or high humidity levels. Poor ventilation can also contribute to mold growth by trapping moisture inside the vehicle. Regularly cleaning and aerating the car can help prevent mold from developing.
keep a dryer sheet in your pocket
The AC takes the moisture out of the cabin air and that helps clear the inside of the windshield from moisture faster.
It doesn't.
Get a defroster. / if you mean on the inside make sure your vent control is set to outside air not recirculated air the moisture from your breath will condensem on the windows and create ice and you can also crack open your window that will help
It's condensation caused the variance of temperatures.