How To Tell If Your Makeup Is Expired

To get the maximum mileage out of your beauty products, Sonia Kashuk says to store them in a cool, dark, dry and clean place. "The most common causes of contamination are exposure to sunlight, air and extreme temperatures," she says. "Write the date on a product when you open it for the first time and remember to put the lids back on after each use."

Click through for Sonia's guide to understanding makeup expiration dates.

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Associate Beauty Producer

It's hard to say goodbye to your favorite nail polish or mascara no matter how streaky or flaky they've become, but when a beauty product goes bad, it's not just the quality you have to worry about, it's the bacteria.

Unfortunately, not all products have expiration dates on the packaging, so aside from smell and texture, it can be unclear when to actually throw them out. Above, Sonia Kashuk, makeup artist and founder of her own runaway success line at Target, shares her tips on when to replace your makeup.

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