If you’re like most people, you probably use your hookah pen for smoking tobacco. But if you’re like some people, you also use it to vape e-cigarettes or marijuana. In either case, the pen needs to be cleaned regularly. To clean a hookah pen, first make sure that the pen is empty. Then fill it with water and soak it for a few minutes. Next, take the pen apart and scrub all of the parts with a brush or a toothbrush. Finally, dry the pen off and put it back together. ..