I've been using it. I can use it at night and during the day. The usage is the same at night and during the day. After washing your face (remove makeup at night, especially your eyes), gently apply the gel around your eyes, massage it counterclockwise, and don't pull it until it is completely absorbed. Then apply toner and cream and follow the normal skin care steps. If you feel that your eyes are not well absorbed, in order to avoid growing fat particles, you can apply them at night, not during the day, depending on your specific situation.