DD8 delta 8 all-one-vape pens contain high purity and oil concentration that is very thick and viscous. In some rare instances, the heating core can become oversaturated, which can cause blockage of the airway. Here are some helpful tips to clear the airway and get your vape running smoothly.Store at room temperature. Avoid exposure to extreme cold or heat.   Clogged pens sometimes unclog themselves if you store them upside down after use.Cover the two small carb holes next to the side windows and inhale while holding to release the clog and clear the device.Another trick is to blow two to three puffs of air into the bottom of the device (where the micro usb i located). You will see the center light illuminate when blowing into the bottom. Then turn your pen upright and take a few good pulls from the mouth to get it going (cover carb holes in the above tip for optimal results).If your pen doesn't unclog, try using the "toothpick technique". Gently insert a toothpick into your devices mouthpiece. Repeat this process at least 3 times until the blockage is cleared. For further assistance or general troubleshooting inquiries please contact us.