Don't tear it off directly by hand. Apply makeup remover or warm water to double eyelids for a while, and then gently wipe it off.
There are mainly two kinds of double eyelid stickers, one is a wide small semicircle, which is attached along the arc of eyelashes, and the other is a narrow crescent shape. This kind of double eyelid patch can not be attached along eyelashes, but along ideal double eyelid lines.