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The cockroaches has been a vexing problem.They always climb out from the holes when we sleep secretly,and cause people fear or derived to dirty environment.Anti-Cockroach just like to use the soap into a small piece,and then placed in it,mixed with the soap-cuts,and transformed into soapsuds when we take a bath.Then,use the concept of the spiral that soapsuds flowing into the pipe in rotary manner average dispersed,and water vertical flowing down.We can prevent cockroach sneaking into our house through drainage by utilizing cockroach’s fear of soapsuds.This method cannot only help us saving money but also environmental.