I use TB Cleaner. Fern, speak to Lou about this he has done his many times. You are going to be disgusted when you see how dirty it is. Have lots and lots and lots and lots of rags handy too. Your gonna need them. You might even consider spraying a lot of cleaner in it and then let it sit over night to get in the areas that you might not be able to reach. I also found have a round firm brush like a bottle brush but maybe more firm helps too.
