until you are blue in the face idiom
任凭你磨破嘴皮
If you say or shout something until you are blue in the face, you are wasting your efforts because you will get no results.
You can tell her to clean her room until you are blue in the face, but she won't do it. 任凭你磨破嘴皮叫她打扫自己的房间，她也不会去做的。