Yesterday my PV1 just up and died. Changed the atomizer, tried new batteries, still no signs of life. Thought it might be the switch so I broke out my spare PV1 and changed it, still dead. Loaded up my spare PV1 with the same batteries and atomizer and it worked fine. Thought now my other PV1 has problems. Started emailing Casey. In an effort to find out which component was the culprit before complaining, I switched each component one at a time to the working PV1 and it still worked. Turns out it was a bad connection between the threads and end caps. I have had this problem before and usually just unscrewing and rescrewing the end caps, either end, will solve the problem. This time it didn't and they needed a good cleaning with soap and water and a tooth brush. So, the point of this thread is two fold, add thread cleaning once a week to your list of things to do. Never give up on an atomizer until you test it with an ohm meter, it could just be a bad connection.
Brian
Brian