I too suffer at nights tight knees, but mine are tight all dat too. I only sleep 2-3 hrs at a time and normally go to bed 10-11 pm and get up sometimes 2:30 go back to sleep and get up 4:30 am because of it. I see no relief nor changing that. Im long term disability and going to have to retire soon, i am 62 now. Im one of the group that hasnt faired out well because RON stays at 90 degrees and knees always tight after a year and MUA on one knee to try with no success after surgery. Got to 120 under anesthesia, cant get past 90 awake, knee remains tight.