Do you honestly think we can clean ourselves of anything?
"Having therefore these promises, dearly beloved, let us cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God" (2 Cor.7:1).
In this verse the Greek word translated "let us cleanse" is in the "active" voice:
"The active voice represents the subject as the doer or performer of the action. e.g., in the sentence, "The boy hit the ball," the boy performs the action" (Blue Letter Bible).
So you have concluded that those in Christ sin?
I know that I have sinned since I was saved. Does that mean that I am not in Christ?