So I posted this in a different forum and did not get a response from anyone. I have a joye 510, I got it yesterday and it is my first ecig. I got some ejuice with it and was wondering how often I need to refill the cartridges. It came with 5 and I heard you can just keep refilling them until the stuff inside gets old, then just start all over with a new cartridge. So how often should I refill the cartridge and how long does one usually last til I need to replace it???