i battled knee issues but mostly from bad position. Once i corrected my position i got back to a strength program which i neglected for over a year. I have increased range of motion and strength in my knees,hips, and ankles. This has helped me tremendously in so many ways. If your not strength training look at adding that into your week. I kicked my 5th ride for the week to get 2 days a week of strength training. Feel better and am still seeing improvements. Dead lifts, Squats, bent over barbell rows, and push-ups are all i do. Oh and my knees feel better than ever. Hope you can use some of that to improve your issues.
Mike