2 Pet 2:20; For if, after they have escaped the defilements of the world by the knowledge of the Lord and Savior Jesus Christ, they are again entangled in them and are overcome, the last state has become worse for them than the first.
2 Pet 2:21; For it would be better for them not to have known the way of righteousness, than having known it, to turn away from the holy commandment handed on to them.
2 Pet 2:22; It has happened to them according to the true proverb, "A DOG RETURNS TO ITS OWN VOMIT," and, "A sow, after washing, returns to wallowing in the mire."
Heb 12:15; See to it that no one comes short of the grace of God; that no root of bitterness springing up causes trouble, and by it many be defiled;
Just because you were washed doesn't mean you can't get dirty again.
John 13:9; Simon Peter *said to Him, "Lord, then wash not only my feet, but also my hands and my head."
John 13:10; Jesus *said to him, "He who has bathed needs only to wash his feet, but is completely clean; and you are clean, but not all of you."
You still have to "wash up" every now and then.