She sprays some bubble wrap with some water and she lays it over her window. She does this because it helps to keep the cold out in the winter and it also helps to keep the heat inside. This could save you a ton of money when it comes to your energy bills and it is a very cost efficient way to improve the energy efficiency of your home.
Watch the video and see it for yourself, you only need a spray bottle of water and some bubble wrap to do this trick and it only takes a few seconds to do. You don’t need to worry about tape, glue or any other sticky substances and you too could have this in your home in no time at all. This is a great trick and it could save you more money than you’d realize.