TOPIC: Improving Simulator scores from 60-65%

I am using the PM Prepcast simulator for PMP and doing the chapter wise test .My scores always between 60-65%. I haven’t started taking the full exams in simulator yet. What is the best way to use PM Precast Exam Simulator and practice? How many exams/questions to practice in the simulator? How to improve the scores in the simulator? Any suggestions/advice will be very helpful.

What I have done is to go over the incorrect questions and figure out what I didn't know and then searched youtube for quick explanations of that area. For example, I kept getting confused about the different diagrams and it helped me to get an overview of what the different diagrams are and what they physically looked like. Hope that helps.