① Blocked drain
Remove the pop-up cap of the drain as the picture shows. Check if there's any blockage in the drainage pipe and clean it.
![](https://saas.bk-cdn.com/t/35d485ae-4ed2-40fa-852f-69628021d58e/u/45795e22-da27-4982-9f6a-3922c022d40c/1685163371792/image.png)
② Blocked U-shaped odor prevention pipe or drainage pipe below the groove
If the above steps still do not work properly, please check if the drainage pipes and U-shaped deodorant pipes at home are blocked.