Hi,

We apologize for any inconvenience caused.Please follow these steps to try and resolve the issue:

1. **Inspect and Clean the Main Brush:**- Remove the main brush.- Check the ends of the main brush for any tangled cables, hair, or other foreign objects.- Clean the main brush thoroughly.

2. **Install the Main Brush Cover:**- Ensure that all four sides of the main brush cover are securely in place.

If the problem persists, please feel free to contact us(support.na@dreame.tech) again. Thank you for your understanding.