thinks have been going good for me so far knock on wood ,but on june 7th or 8th some where around there i was heading to work or getting ready to leave blew into the tube and got a violation thought it was my mouth wash blew again violation there was a spill on the seats in the back of laccer thinner had had to remove seats and was was onnd was able to carr was able to carry on User's recommendation: watch for spilt chemicals in car or truck sets it off everytime.