There are a few things you can do to make sure the lashes stay in the lash box. First, make sure that the lashes fit snugly in the box. If there is too much space between the lashes and the sides of the box, they can fall out. Second, store the lashes in a cool, dry place. If they are stored in a warm or humid environment, they can become sticky and difficult to work with. Finally, do not overfill the box with lashes. This can cause them to become tangled and difficult to remove.