Slash your heating bills this winter with a proven trick: Check your windows for costly leaks

Airtight windows are not only the key to maintaining warmth in the house but also significant contributors to savings. Before you resort to laying blankets or towels on the windowsill, you might want to consider a much more effective solution. Moreover, it won't cost you a penny.

In an era of ever-increasing bills, we constantly search for ways to conserve where we can. It turns out that sometimes it takes only a small effort to care for your wallet's well-being.

In this case, it is worthwhile to ensure the appropriate temperature in our apartment to somewhat decrease the heating bills. Let's begin by checking if our windows are indeed airtight.

All you need is a banknote of any denomination. A good alternative would be a piece of paper. However, remember that it should not be too stiff; otherwise, our experiment may fail.

Next, open the window and lodge the banknote between the frame. If you can easily pull it out, this could mean that your windows are leaking. However, if you struggle to remove the paper, you can confidently presume that your windows are working efficiently. They are set to winter mode.

Did you use the banknote test and found out that you have leaky windows? No worries! This is easily fixable. All you need to do is find out the mode in which your windows are set. How do you do this?

An overwhelming majority of modern, plastic windows have a hidden regulator inside the frame. With hexadecimal keys, which most of us have in our tools box, we can adjust the tightness of our windows and set them to winter mode. The process is similar to the one shown in the video below.

Not everyone is aware that windows' frames can slightly expand in the summer season due to frequent opening and high temperatures. In contrast, the materials they're made of often shrink in winter. Hence, it's crucial to adjust their tightness at least twice a year.