There are a few potential reasons why your Terp pearls may not be spinning. One possibility is that the pearl is stuck in the spindle. If you can't get the pearl out, you can try using a hair dryer to heat up the spindle and loosen the pearl. Another possibility is that there is something blocking the spindle. If you can't get the pearl out and it's not stuck, you might need to take your terp pearl apart and clean it.