Its vary hard to change a habit, because you literary need to rewire you brain. And the brain is one lazy mofo, he doesn't want to lose energy. He be like - why do you want to change your habits, we are surviving this shit, no need for that. Maybe a new habit will lead us to death, please don't change anything. So you kind need about 90 days to prove to him that's all good.
:)) yes, he is not lazy, just saving energy for our survival. it's a smart guy and you have to be persuasive to convince him to rewrite itself. Which is not bad, it won't be good for us to have it changed to rapidly.