It doesn’t thrill you like it used to.
For several months, you couldn’t get enough of the stuff. But lately, your desire to inhale has been greatly diminished. It’s as if your cologne has lost its potency — because it probably has. On average, cologne will last between 12 months and two years after it’s been opened, says Matts. “How long it lasts depends on how you store it,” he says. “It’s best to use a cool, dry, dark place. Keep it out of the heat and direct sunlight.”