I'm not gonna lie, I was starting to think this certification wasn't meant for me. Failed my first attempt by 11 points, then failed again about four months later. I've been working as a dialysis tech for almost three years now and knew the clinical stuff, but the exam kept tripping me up on water treatment and machine troubleshooting specifics. My unit manager was incredibly patient but I could tell she was getting a little worried too.
What finally turned things around was actually being more systematic about my weak areas instead of just re-reading the same CCHT study guide chapters over and over. I started doing timed CCHT practice test blocks every single morning before my shift — like 25 questions, then reviewing every wrong answer before moving on. Not skimming, actually understanding why the right answer was right.
Total study time for attempt three was probably 90 hours spread over eight weeks. Passed with a 78, which honestly felt like a 100 to me. Happy to answer questions if anyone else is grinding through this thing.