What are the cleaning instructions for the chamber to avoid build up? What can I use to clean it if i get one

Cactus Juice forms an emulsion in water.  It is very easy to wash out the chamber with regular dish soap and water. I wash my chamber out after every use. The resin has a viscosity of around 8 CPS meaning that it is about the consistency of blood or kerosene (sorry, only measurement that I could find that compares!) and it does not set up unless it is heated up. You will not get any build up in the chamber.