I know that I have the Spirit because of the inspired written word of God and the promises therein. What about you?
I fully agree that the blood of Christ cleansed me of all my sins when I believed the Gospel as preached by Paul as recorded in 1 Cor. 15:1-4. No works will ever be able to add to anyone's salvation nor to retain salvation. It is ONLY the shed Blood of Christ.
As to the erradication of my sins, they are gone finneto, nada, destroyed... That is what the shed Blood of Christ accomplished for me given that I was saved by grace through faith, and that not of myself, but a gift from God. Nothing else will ever suffice not supplement my salvation. What about you?
So, no, we do not have to DO anything to "get rid of" our sins. We could never DO anything other than to have faith in the death, burial and resurrection on the third day for out sins and for our redemption from the resulting death to which retained sin leads. What about you?
MM