Please try using a cotton bud dampened with a tiny bit of rubbing alcohol (squeezing off any excess first) to clean the contacts on both the pod and inside the JUUL device where the pod is inserted. This should restore the connection between the pod and the device if any moisture has been in contact with them.
There may be a few tiny air bubbles located by the wicks of the JUULpod that can also contribute to the issue. Please try taking the pod out and gently tapping it (mouthpiece side up) on a table and reinserting. This should make the tiny air bubbles rise and re-saturate the wicks. You may also want to try using an alternative JUUL pod to see if that helps.
If you continue to experience issues, please contact the JUUL Care Team.