To take something that has lost it’s sticky properties and to make it sticky again.
In the instance of something like a lint roller, this would be achieved by removing a layer of the disposable sticky paper to expose a fresh sticky sheet.
“Wow, those bluemats to catch all the dirt from under your shoes are so cool, how often do they re-stickify them?”
Meaning: to become a conspiracy theorist, to think of something so absurd nobody else thinks you're sane.
Etymology: from Sticks the Badger, a character in Sonic Boom that is generally a conspiracy theorist.
Thomas: America pays people to film there so America can look better.
Miles: Thomas, that's- you've became a conspiracy theorist. That's how to Sticksify someone.