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Mark Your Makeup to Know When It’s Time for the Trash

You may now understand the symbols on a package. But, knowing that something expires three months after opening it might not help you. Like, when did you actually open it? If that part is a mystery, you're in a pickle. Here's a handy tip: Take a sharpie and write the date on the tube. It's pretty unlikely you will remember otherwise. Try it out right now. When did you open your favorite nude lip?

Augusta Falletta / BuzzFeed

We're pretty sure you can't answer that. From now on, go the extra mile. Write the month, day, and year. Not only will your skin thank you, but you might actually use up products knowing their deadlines!