Ask any beauty lover about skincare and they’ll tell you that it’s the more the merrier.

Heck, just about everyone lovesdoing a good face mask.

It makes you truly feel like you have your life together.

Woman wearing a clay face mask and a towel on her hair

That means that there are likely multiple in your skincare line-up.

Unfortunately, that means that they also the ones that could be expired.

Especially because they’re not used every single day.

Cream face mask sitting on a green background

When it comes to knowing your masks are expired, you’ll need to check the expiration date.

According toOprah, cream and gel face masks can last up to one year if they’ve been opened.

Those are typically the moisturizing and refreshing masks.

Unfortunately, it’s not the same for clay masks.

Once you launch the clay mask, it’s only good for six months (via Oprah).

You don’t just have to rely on your memory to know if your product is expired or not.

There’s a very specific label you’ll find with the date on it, and according toByrdie.

“Look for the PAO or period after opening label.

The symbol looks like an open jar.

Of course, you could easily mark on the bottom of the product the date that you opened it.

That way, you know exactly how long your products are staying fresh for.

It’s time to take a closer look at those bottles, my friends.

If nothing else, it’s a great excuse to stock up!