Clogging is a common issue with any vape cartridge. This most often occurs due to un-inhaled vapor remaining in the airway after use, and, upon cooling, the vapor turns back into an oil and sticks to the inner walls of the vape cartridge airway. Over time this will continually build up until there is total blockage of the airway. You can fix this by inserting a skinny item, like an unwound paperclip into the airway and scraping the walls to remove the excess oil. This oil is safe to consume orally if you wish.

A temporary solution is to preheat your cartridge in order to create warm vapors that loosen the oil in the airway. While this may create a temporary hole in the airway blockage; the blockage is likely to reoccur immediately after use and may eventually lead to oil buildup that works its way out of the airway and into your mouth at some point.

Prevention or delay of these clogs is possible by clearing the airway fully after use. The less remaining vapor, the slower the buildup of oil. Another way is to take smaller hits. Larger hits tend to thicker vapor (i.e. more oil) in the airway compared to hits of 3 seconds or less.