Generally, the easiest way to remove your false eyelashes is to apply a makeup remover on a cotton ball or pad, pressing it to your eye and waiting for the makeup remover to loosen up the glue. Once the glue is softened, gently lift up on the outer corner of your fake lashes and slowly/ gently peal the lash up along your lash line until you can fully remove them.
For longevity, you can gently clean your false lashes with a cotton tip & makeup remover or rubbing alcohol after use, picking off any excess glue along the lash band. Make sure to store your used lashes back in the try to maintain them for their next use! If you are gentle, and maintain them properly, you can get 10-15 uses (or more) out of a lash.