Fresh water is continuously supplied into the root canal from the handpiece along the outside of tube. At the same time, the tube aspirates the water with blood, pulp tissue, and debris. The water stream also washes the root canal wall.
When the root canal is cleaned enough, stop water supply and keep aspirating the water left in the root canal to dry. It will take only a few seconds. And then, confirm that the root canal is completely dried with a paper point.