Please follow these troubleshooting steps first:
1. Please stop the device and check whether the jet is completely submerged.
2. If yes, check whether there is any foreign matter blocking at the filter and motor blades, and whether there is contact between the blades and the inner flow channel? If so, please remove the objects in time.
If the issue continues, please provide:
1. A brief description of the troubleshooting steps you have already tried.
2. Photos or videos showing the issue.