Is it true that it is better to store face masks lying flat?

I am someone who has absolutely no knowledge about beauty.

I learned things one by one while doing Unnie's Pouch.

However, I used to stand the face mask up by the refrigerator door.

I heard that it is better to store it lying down because the essence flows down if you stand it up.

Is that enough to make a difference in effectiveness?

I put the face mask on my palm and tap it to use it.

If there is a difference, I plan to change the storage method right away.