How long are you holding the button down when vaping? How long are you waiting between draws to give your atty time to cool down? Attys don't like to get overheated and they like time to cool down between draws. As others have mentioned they also want to be wet. LR attys are particularly sensitive to being overheated and do tend to have shorter lifespans then other attys.
Without a doubt some attys are duds, but most often it is user error that causes extremely short lifetimes of attys.
Without a doubt some attys are duds, but most often it is user error that causes extremely short lifetimes of attys.