Your eyelid position is everything. If your eyes are too open, the applicator curvature won't line up with your lash line. Try closing your eyes about halfway — that's the sweet spot. Practice the position a few times without lashes first.
The magnets need to face each other. The top lash has magnets underneath, the bottom lash has magnets on top. If they're the wrong way around, they won't snap together. Flip them and try again.
Don't pull the lashes straight off — that tugs on your real lashes. Instead, grab the magnets between your thumb and index finger, point your thumbs toward each other (not toward your eye), and gently slide them apart.

