To clean the magnets gently use your fingernail to scrape any residual magnetic liner off of the magnets. It can be really hard to see if a magnet is dirty because they are so small. It's a good idea to clean them occasionally, just to make sure they stay clean. Dirty magnets won't stick well to the liner.
Lashes cannot be cleaned but should not need to be cleaned since they do not have makeup directly applied to them.
IMPORTANT: Do not clean lashes or magnets with liquids or apply liquids to the lashes or magnets. This will damage the lashes.