are you exercising? if not, you could avoid a lot of complication dealing with smoking regimens or buying new equipment. A vaporizer will definitely help a cough (I have a vaporWarez), but for your own sake and for simplicity's sake, just get exercise every day. I have absolutely no cough, during smoking and otherwise, as long as I get a sweat on semi-daily. And I"m someone who prefers smoke, not vapor. I do an elliptical, pushups, situps, but you don't have to have equipment; you could just go on brisk walks (which are doubly fun when you punctuate it with a outdoor smoke session somewhere)

It's awful to be talking to someone, such as a parent, and have to clear your throat of phlegm. My 'rents always suspected I was a smoker because of it.