I'm not sure I can help...certainly not with the multiple cleanse part. I am on day 17 of my first cleanse...a 30 day. I have the sense of calm confidence that you speak of and I am enjoying it tremendously.
But here is what I do know about doing something which once was a "fist time" and now is a second or third time, cuz I really have alot of trouble here also. I speak for myself though I believe others probably have simiar experiences. The first time we do something, especially if it is a positive almost adventurous undertaking, there is a certain 'rush' of sorts that carries us along...that will never be experienced in quite the same way when we do that again. Do you know what I mean? Unfortunately, many of us, myself a major offender, often don't follow through with many well-conceived plans because of that very reason.
But the fact that the second and subsequent undertakings are not as pleasurable the next time around is not necessarily a bad thing. At least, try and look at it that way. Because what you are doing is worth more than that 'first rush'.....now, you are working at it and making significant changes to your present and future health. Now you are continuing the good thing you started. And that is a good thing. In fact, you could say ...that is the better thing. You can feel very good about that.
This is where your education and hard work and just plain 'stick-to-it-tiveness' will really pay off and shape the person you are becoming - inside and out. That is a much more important thing to experience - the committment and work aspect - rather than the 'feel-good' aspect. Don't you think? It's kinda like first crush or fist love...or that romatic feeling you have when you fall in love that always dies off. If you got the right stuff (which just takes the work and commitment to continue), it becomes something deeper and better! And in time, a certain 'feel-good' will return for that very reason - a sense of pride in your accomplishments. Then, who knows what may be over that next hill............Never Give Up.