Lashes not staying put? Here are four top reasons, along with how to fix them! Magnetic eyeliner and eyelashes alleviate the need to mess around with tricky lash glue or other irritating adhesives; however, it does take a little bit of practice (that's the bad news). Once you figure out the 'sweet spot' for eyeliner placement and thickness and optimal lash placement - you're ready to rock (that's the great news!)