"The warm air will gradually heat the glass and loosen the frost or ice, making it easier to remove." It's also smart to turn on your rear defroster if you have one because it's specifically ...

The rear defroster is powered by electricity and operated by a dashboard switch. Turning it on activates a grid of wires, visible as thin lines on the inside of the glass, that heat the rear ...

If they're stuck, resist the urge to forcefully pull them off the glass ... heater if the temperatures reach below the 5 degrees Fahrenheit threshold. Once the engine is on, turn on the defroster ...