I work in the food service industry and have for years. Last week we had a large catering event,after all the food was cooked and served , we began cleaning up.I was giving the waitstaff a hand by cleaning out of the large coffee urns... The chef came and asked me what I was doing... He then told me quite angrily that you never clean a coffee pot. He informed me that it removes all the oils and residues from the coffee pots? this guy went to culinary school and is a good cook,I have not. My question is, HAS ANYONE EVER HEARD OF THIS? I am sure the board of health would agree with me,but then again I don't have any formal training so I am just keeping my mouth shut...