i’ve had 2 knee operations knee feels like loose?
you have either of those possibilities 1-chondromalacia patellae which is early arthritis of the patellofemoral joint. which can be felt as continuous crepititions with flexion or extension. 2-meniscial injury: if the clicking is one click in the range of motion from flexion to extension or vise versa. get a normal xray done and mri of knee if the case is the second one. physiotherapy is going to help you regain your strength and stability.