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How to clean the blocked washbasin?

The water in the washbasin is slowly blocked. The first method of dredging is to pour soda and vinegar into the sewer. After the acid in soda and vinegar reacts, the sticky things in the pipeline will be removed. In addition, the log dredging method can also be used, that is, a log is inserted into the water pipe, twitched up and down, and the dirt is washed away by suction and pressure.