How to make a Dunlop Crybaby wah pedal louder.

My pedal is extremely quiet whenever it is plugged in. I have all my volume knobs turned to 10. I don't know what it could be. It is pretty old so that could be it. PLEASE HELP!|||might have to replace the transistor.look for any lose wire.theres only like two or three transistors in there.those are for gain it amplifies...you can open it up while its pluged in.and play your guitar take a pensil and tap each component one at a time and see if it gets louder.it might be a loose soder joint