I've had it for nearly 50yrs.Caused from hours and hours on those diesel tractors.These days I've learned to just kick back,sip on a cool glass of Tennessee whiskey and enjoy the sound of the crickets singing.I really don't think there is a damn thing you can do about it,so learn to live with it.

~Molɔ̀ːn Labé Skýla~
As Bob Hagel would say"You should not use a rifle that will kill an animal when everything goes right; you should use one that will do the job when everything goes wrong."Good words of wisdom...............