Magnetic lashes are, in theory, easy to apply. But the actuality is that it takes a bit of practice before you can just snap them on like a pro.
After a few (OK, many) trial runs, we've found that the single most helpful thing you can do when applying them is to cut the bottom strip into multiple pieces.
How many pieces exactly? No more than three or four, but make sure to cut them so each has its own magnet. Then, place the full top strip along your lash line and snap the bottom pieces into place one by one. Start at the outer corner of your eyes, follow with the inner corner, and end in the middle.
The hardest part about applying magnetic lashes is getting the alignment just right; it's much easier (and more precise) to do this with smaller pieces rather than fumbling with an entire strip.