Like most, at least once in the past, you’ve cleaned out your bathroom cabinet or makeup bag to find that your old favorite beauty product unfortunately doesn’t quite smell the same anymore, or the texture and consistency has changed.

Unlike food, cosmetics aren’t required to have an expiration date on their packages. Most products, however, have a jar symbol with a number that signify how many months the product will last after it’s opened. Since most people don’t keep track of when they open a new beauty product, we’ve created a list of ways to tell when your cosmetics are ready to be replaced.

1. Mascara and Liquid Eye Liner:

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“A Mascara tube is a dark, wet environment – the perfect breeding ground for bacteria,” -New York City optometrist Andrea Thau, O.D.

Bacteria tends to flourish in these makeup tubes. It is very important to replace your Mascara or Liquid Eye Liner every 3 months. If delayed, the bacteria might spread to your eyes and can result in an infection or sty.

2. Foundation:

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Dipping your fingers and brushes into liquid foundation increases the odds of bacterial growth. If you use a liquid foundation, we recommend replacing it every 6 months and every 18 months for powders. If you start noticing breakouts or irritation after using your foundation, that is a good indicator that there is bacteria in it and it needs to be replaced.

3. Moisturizer or Eye Cream:

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Moisturizers should be replaced every 6 months. If your moisturizer or eye cream has acids in them, they will tend to have a longer shelf life. These products will last longer and not grow bacteria as fast if they are stored in a cooler environment, so try putting them in the fridge! Cold eye cream also feels great and can help with puffy bags around your eyes.

4. Lipstick and Lip Gloss:

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Your lipstick should stay good for 1-2 years, but if you notice the texture has changed or it smells off, throw it out!

A good thing to remember for all of your products is if it smells funky or the texture has changed then it’s time to replace it!