If you have a habit of holding on to your old makeup and using it for months or even years, it’s time to have a clear out. Old makeup is a breeding ground for germs and bacteria, meaning that every time you use it you’re risking breakouts or even infection. When you buy a new beauty product check the label; there’s a little image of an open jar with a number next to it. This signals the number of months the product is safe to use after it has been opened.