So, to make sure you don't get caught out, former-NASA engineer Mark Rober uploaded a video explaining how to quickly defrost car windows in four steps.
Mark uploaded the six-and-a-half minute video a few years ago, which explains how to defrost car windows using the power of science.
So if you can't find Mark's video online, and have run out of de-icer, here are the four simple steps:
Step 1: Turn ON the heater at full blast – hot air can hold more moisture.
Step 2: Turn ON the air conditioning – this will help soak up the remaining moisture from the air.
Step 3: Turn OFF inside air circulation – winter air doesn’t have much absorption so keep it outside the car.
Step 4: Open the windows ever so slightly – for a few seconds, this will help exchange humidity in the car for the dry air outside.
Mark Rober was at NASA for nine years, seven of which were spent working on the Curiosity Rover.