 Environment also plays a factor as moisture and contaminants on the key itself work their way into the lock cylinder tumblers every time you slide the key into the ignition. Our solution? PB Blaster, of course. Using Blaster's ProStraw with control flow technology, we were able to precisely add the penetrant where it was needed the most without making a mess. And after working Blaster in and around the ignition, the tumblers became unstuck and are now good to go.