As long as your fan motor is working and your heating element is getting hot and not causing any additional problems, you should only have to replace the cardboard gasket and the wick. Your heating element looks like all of the others I have seen. The gaskets can be ordered directly from MTH. They are typically $2 each. I like to use "tiki torch" wicks in all of my smoke units. Just cut them down to size.
These smaller smoke units do not smoke as well as their larger counterparts so don't expect a lot. Most likely due to less air flow and only one heating element. Also, these smaller units are extremely easy to overfill, so be careful.
-Ryan
