Self Balancing Bot

This is my latest attempt at making the Self Balancing Robot. I swap out my old yellow dc motor to an all metal dc motor. I also throttled up my infill settings on my 3D Printer to make it as heavy as possible. Unfortunately, things didn't turn out as I hoped. The bot isn't able to balance itself. In my next attempt I will try to use another type of DC motor that seemingly doesn't exhibit the sticking problem. I'm also going to use a different mechanical design, perhaps with CNC or filling my 3D Print with plaster to make it extremely heavy to keep the sticking problem away. I'm also hoping to see more ideas and advices from the community on what I can do to improve this!