Who is responsible for treating the sludge entering the elevator shaft?

The property management company is responsible for handling. According to the inquiry of China Property Management Institute. The sludge in the elevator shaft is treated by the property management company. The property management company shall regularly clean the elevator shaft to ensure that the elevator shaft is kept clean and safe. If sludge enters the elevator shaft, the property management company should clean it up in time and take measures to prevent sludge from entering the elevator shaft again. Residents should inform the property management company in time if they find sludge entering the elevator shaft. The property management company should clean up the sludge within 24 hours. If the property management company fails to clean up the silt in time, residents can complain to the local housing construction department.