Apparently they can also be captured in a ring of salt: https://laughingsquid.com/performance-artist-uses-solid-and-dotted-circles-of-salt-to-create-a-confusing

Apparently they can also be captured in a ring of salt: https://laughingsquid.com/performance-artist-uses-solid-and-dotted-circles-of-salt-to-create-a-confusing-trap-for-a-self-driving-car/#:~:text=Jame%20Bridle%2C%20an%20artist%2C%20writer,in%20a%20circle%20of%20salt https://laughingsquid.com/performance-artist-uses-solid-and-....