 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. After working Blaster in and around the ignition, the tumbler became unstuck and is now good to go. PB Blaster is available at home, auto, or hardware stores near you. At Blaster, they know rust. So always use Blaster products and work it like a pro.