Vape cartridges clog when excess vapor cools and then condenses along the walls of the inner cartridge. It then solidifies into oil, causing a buildup in the airway or blockage.One way to prevent this is to continue pulling air through the cartridge for a few seconds with every puff. The extra draw of cool air will help to keep your cartridge clean and clear, preventing blockage from ever occurring. It is the best way to care for your vape products.Many people like to draw too hard on their vapes, which can also cause blockage. Pull a bit softer to prevent blockage or flooding of your cartridge.If your CBD or Delta-8 THC vape cartridge already has a blockage, then you will need to clean it. The best way to do this is to gently scrape out the excess residue with a toothpick, gently scraping it out of the cartridge.