I have had three “ poor preps”. My newest instructions are for low residue diet and a capful of Miralax each night for seven days. Then the day before, Golytely am and pm. Day of, I’m to drink half of the Golytely. If this doesn’t do the job, then I don’t think it can be done, I feel like the doctors are all about blaming it on me. My last prep was almost as hard as this one is going to be.