If you’re onTikTok, the same probably applies.

We definitely have a slew of favorite makeup products that we would take with us to a desert island.

Of course, you want to avoid this possibility at all costs.

Woman getting cat eye eyeliner applied

No amount of gorgeous smokey eye looks are worth the risk.

What should you watch out for to determine if it’s time to throw out your liner?

This might look oily or like a “white film.”

Woman applying liquid eyeliner

Either way, it’s a surefire sign your liner is way past its expiration date.

It could also be a symptom of sharing eyeliner with other people, which is a big no-no.

As perInsider, a liquid liner may also dry out.

Woman applying eyeliner

Thankfully, there are some general tips to follow when it comes to the life expectancy of an eyeliner.

you’ve got the option to also swipe liner directly on the water line.

However, we’ve since learned that keeping it simple is key.

Tubes of black eyeliner

According toInsider, pencil eyeliners should be thrown away after around a year of use.

The reason pencil liners last so long is because you shave off the tip with your sharpener.

Don’t forget to do that two to three times a week (viaHealth).

Cat eye eyeliner

Liquid eyeliner has a shorter lifespan

You might have nixed your pencil eyeliner years ago.

Much different than pencil liner, liquid eyeliner comes in a tube.

You should throw away liquid eyeliner after at most six months of use.

Here comes a couple more things to watch out for when it comes to your favorite eyeliners!

It could be so bad that you unfortunately develop irritation or an infection.

This kind of irritation from allergens or infections from bacteria can endanger your eye health.

If you’ve noticed a stye as of late, check your eyeliner.

Is it past its expiration date?

Does it smell strange?

Is it thicker than usual?

If the answer to any of those questions is yes, you may need to throw it away stat.