No it isn't me, CC. It's the legendary Americana singer/songwriter and political activist Steve Earle. Steve is my life hero and role model, hence the tribute to him in my avatar and my signature. Thanks for asking!
I've got a lot of physical issues but popping/grinding knees ain't one of them. Sounds like either arthritis or cartilage damage so I would recommend seeing a doctor. Good luck. Can't be any fun.
Have no idea why but I get the feeling you suffer from popping/grinding knees, any tips on how to deal with these? If you don't then I'm sorry for having wasted your valuable time.