You must have encountered this many times in your beach trips. You wake up in the morning, pull the curtains and the glass doors are frosted. This is a natural phenomenon. You had the air conditioning on given the heat of beach places. But the outside was humid – again, it is a beach place. So the humidity outside collects on the cold glass door and condenses – giving that frosty look.

I woke up this morning to this same frosty glass door. The problem is that we did not have the air conditioning on. It is freezing here in Florida. How did the condensation happen then?