Gently pull off the lashes.
Please ensure that your eyelid is free of oil before you apply your magnetic eyeliner. This will drastically improve the eyeliner's hold.
In this case, simply trim the lashes by cutting off 1 magnet. Just make sure that there are magnets on both edges.
This can happen when the liner is too wet when you apply the lashes. Let it dry a bit longer before applying the lashes.
However, it is normal that some of the product will remain on the magnets after use. You can clean the magnet by gently scraping it with your fingernail.
If you get makeup on your lashes, just add a small amount of makeup remover to a cotton swab and gently remove the makeup.