My experience has been that engine cleaners and degreasers work ok. I like to seperate the top and bottom and soak them in a solition of water and Era laundry detergent and then clean with a stiff tooth brush. It's also been my experience that you have to seperate the two in order to work on the pieces that adjust the pricing. It's not hard but it's not a fast process.

Life is like a video game. The more you play, the better you get!!!