I have bought a secondhand wax separator (CooknBeals) with model no 3320. It is an old model which has done a lot of work. Today, I just discovered that the water mist spray nozzle does not operate properly. There is no mist to the blades, only dripping water comes out from the nozzle. What is the problem? How can I fix it? Can this machine operate without water? Many thanks for all your help in advance.