Unlike curdled milk or a rotten egg, the signs of expired makeup aren't always obvious. Add the layer that it takes a lot for the self-proclaimed product hoarders out there to let go of your favorite beauty goodies, and there's a strong possibility that a particular tube of lipstick or bottle of nail polish might have been your roomie for all four years of college—and should probably cut you a check for those student loans!
While an ancient foundation compact might not trigger you to hold your breath or pinch your nose, don't be fooled by its odorless masquerade. Bacteria lurking in the powder could be a silent killer for your skin.
If you've ever asked yourself whether it's time to let one of your beloved products go, there are some general guidelines that can help answer your question.
