One of the most important things you can do to keep your home fire-safe AND make your laptop last longer is to keep it cool. The key to doing THAT is making sure that its vents are clear and that enough air is passing beneath and around it. There are a few ways to accomplish that air flow: special cooling pads, lap desks, etc. But if you don’t have a lot of money left after buying that laptop to buy any more special gadgets, you can always make one yourself— out of old milk cartons! Rumble’s Useful shows us how.