Pen to screen detection very weak and jittery

I have a Huion H610Pro for a while now and I accidentally dropped my Pen80 that it originally came with. Unfortunately it broke when I dropped it making it hover and draw even without it touching the screen. I tried to fix the pen following some instructions on youtube on how to disassemble and solder it back. I noticed that its graphite thing had broken in half so I guess fixing that was hopeless. I bought a new Pen80 as a replacement and it works fine but the problem is that the pen needs to be literally almost touching the screen just to hover. I can only describe it as like a weak detection with the screen. Pressure is fine but when I hover over the tablet move somewhere else, it sometimes jitters trying to get there and will only start drawing smoothly again when I tap it on the tablet. Any advice? Notes: - I've replaced the nibs multiple times already - Problem still persists even if fully charged - I cant seem to disassemble this pen unlike the first one that broke, I'm assuming this has been glued