coffee enema...not getting results

I have tried coffee enemas several times over a period on months... but, never one or two days in a row. My objective is Liver Cleaning as part of Arthritis help.
This AM I had a two quart coffee enema as per direction posted here. This was followed by two 2qt plain waster enemas in order to become empty. I did not experience the sensation described as a release from the liver. How do I know if the procedure was effective? Incidentally, I held the coffee in excess of 20 minutes. I am goint ot try another 2 qt. coffee enema this afternoon but without the preliminary plain water washout. Also, on the same subject, it seems to take a long time to empty myself. Are there any thoughts on expedient ways of emptying ones self of two or three quarts of enema solution. Thanks for your insights and advice. Tweet