 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. The solution? PB Blaster, of course. Using Blaster's ProStraw with control flow technology, Russ was able to precisely add the penetrant where it was needed the most without making a mess. After working Blaster in and around the ignition, the tumbler became unstuck and is now good to go.