wash hands of
wash one's hands of someone or something
Fig. to end one's association with someone or something. (Fig. on the notion of getting rid of a problem by removing it as if it were dirt on the hands.) I washed my hands of Tom. I wanted no more to do with him. That car was a real headache. I washed my hands of it long ago.
wash (one's) hands of
1. To refuse to accept responsibility for: He washed his hands of the matter.
2. To abandon; renounce: They have washed their hands of him.