We're all guilty of leaving on those Korean sheet masks overnight, thinking there's no harm in it. Of course, there is nothing wrong with doing that but it means you aren't getting the most out of your masks.

We think that leaving on the sheet on our face until it becomes dry is okay.

Wrong.

At an event about Korean beauty, blogger Nikki Tiu of askmewhats.com revealed the follows the instructions contained in the sheet masks packets to the letter.

According to Nikki, leaving on the sheet mask overnight does not help your skin. Rather, the sheet absorbs the serum that's supposed to be on your face. The end result is not you don't get any benefit from using said mask.

By the way, use the leftover essence from the mask on your neck, the back of your hands and even your feet.

Apply the sheet mask after cleansing and toning. Leave it on for 20 minutes. Then, remove and rub the remaining essence on your face.

Remember: Remove the sheet mask while it is still wet.

Watch these videos to find out how to make the most of your sheet masks: