I, too, didn't get the desired results from the ES on my first one or two flushes. It was suggested to me at that time that I might be magnesium deficient as well. I started taking Natural Calm every night. After that, the ES worked like it was supposed to.
I've done 8 flushes now, doing one a month. It took a few flushes for me to see any encouraging results. I felt like giving up at first. I'm learning to be patient. I do the Hulda Clark flush and follow the ingredients to the T. But I do usually eat up till 2:30 or 3:00 and adjust the times of the ES and the Oil and lemon juice. I've had no problem with that.
I'm feeling like I'm making progress albeit slowly. So don't give up.