Before using a device always make sure it is fully charged. Then make sure that you attach the atomizer or heating element correctly.   Load the chamber with material (wax etc.) Do not overpack or under-pack it; you can use a dab tool to help, but it should be about the size of a grain of rice. If you overpack it, some may leak, causing a mess (and wasting material). If you under-pack it, the vapor quality may be lacking, and you may have to vape more frequently. If the vape pen has temperature features, then set your preferred temperature (400°F works best to prevent burning but extract flavors).   Then you are ready to vape. Inhale in a slow, steady manner. If any concentrate remains, wait a few seconds before commencing to avoid burning it.