My sensors are completely stuck to the valves, preventing me to inflate my tires. I’ve not used the locking kit so I expect them to come off using hand force. My car is currently having service and the mechanic just called, worried to break something if going at it with tools. I live in Norway and salt is frequently used on roads in the winter and I suspect it might cause the threads in the sensor to erode and that’s why they won’t come off. Using a metal which doesn’t handle winter conditions, I would say, is a major flaw in your product development.