Run to the mercy seat and let the Lord Jesus cleanse you and go on without the stain, walking in the light. Spot has to do with character. Blameless has to do with relationships
There is room for the fact that human beings, although born-again still, are human, still stumble, make mistakes, fall, and can be forgiven if they repent.
You can’t hide your sin. Judgement for sin is sure. Sin must be punished, but if you accept the gift of salvation and ask Christ for forgiveness you will be saved from that eternal judgement.
Make up your mind about your sin being put to death, work at it and give over your emotions and desires. Ask God to take over your feelings through prayers.