I seem to have a problem with atties for my Leo . I can drip and they work until the juice is gone but with a cartridge it is like the cartridge is not reaching the bridge or one threory I have is the polly shrinks as these attomizers seen to get hot and stay hot for a while . That seems to shink the polly inside of the cartrige so it no longer works right . I keep pulling the polly backup but since the polly is attached I think to the bottom of the cartridge it just shrinks back up to far to work right l