doctor arnolds hypothesis.....
theyre a bit f**ked, not f**ked, just a bit f**ked....
drink lots of water, eat lots of oily fish(dont get tempted to slap anyone with them :)) just eat em, lol, maybe try to build up the muscles around your knees?
powerball seems to work for shit wrists, maybe do some exercises for bad knees?
right, back to work..... :(