I've had my device for about a week now after a few days, I noticed it was starting to decrease in effectivity sometimes it would make no vapour, or gurgling noises and/or spitting juice. After doing some research, I discovered that these were symptoms of the atomizer beginning to fail, I unscrewed the whole cartridge and put a new one on and it seems to be working a little better but it will sometimes show these symptoms. What I am wondering is if I actually did something, or is the atomizer a smaller separate piece that must be removed in a different way?