You may want to open it up with a phillips head jewelery screwdriver (they don't have the lockout screws) and clean the scum off of the pads and button areas. If the rubber pads are still springy, then you are in good shape. I can tell you as a Heavy Retro Console User (with a beautiful Trinitron CRT) that the rubber pads will eventually lose their springiness... there isn't much you can do for that and there are no suitable replacements... but i will vouch that those worn out controllers have given me more than their fair share.