You should be able to get real TSP at a full line paint store. If you do use it, yes rinse it off. I've been using Simple Green for degreasing. I wash the parts down twice and rinse with very hot water. Degrease the boil tank. I originally used distilled h2o for boiling but decided to try my plain tap water, it works just as well. Must be a pretty pure supply. I guess some guys use rain water. Very good info at this link:

http://docs.google.com/View?docid=dfg2hmx7_194gwgwmqdh