Our disposable clearomizers fit the SMOKLY series of vape pens and all other vaping devices with eGo threading. Have you been using your current clearomizer for a while? You may have noticed some discoloration of the silica wick. You may also notice a slightly burned flavor when vaping or that your clearomizer no longer generates the large vapor clouds it did when it was new. If you're not getting the performance you expect, it's time for a new clearomizer. Twist off the black mouthpiece to fill our CE4 clearomizer. Wait a few minutes for the e-liquid to saturate the coil, and you're ready to get back to vaping!