Cleansing is done by

The Holy Spirit

1 Corinthians 6:11

And that is what some of you were. But you were washed, you were sanctified, you were justified in the name of the Lord Jesus Christ and by the Spirit of our God.

Grace through faith

Ephesians 2:8-9

8 For it is by grace you have been saved, through faith—and this not from yourselves, it is the gift of God—

9 not by works, so that no one can boast.

Faith in the blood

Romans 3:24-25

24 and are justified freely by his grace through the redemption that came by Christ Jesus.

25 God presented him as a sacrifice of atonement, through faith in his blood. He did this to demonstrate his justice, because in his forbearance he had left the sins committed beforehand unpunished—

Romans 5:9

Since we have now been justified by his blood, how much more shall we be saved from God's wrath through him!

Ephesians 1:7

In him we have redemption through his blood, the forgiveness of sins, in accordance with the riches of God's grace

1 John 1:7

But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin.

Matthew 26:28

This is my blood of the covenant, which is poured out for many for the forgiveness of sins.

Hebrews 9:22

In fact, the law requires that nearly everything be cleansed with blood and without the shedding of blood there is no forgiveness.