The scrolling of my two Dreamcast mouses do not seem to be very accurate. I am testing in Quake III Arena in exchange for weapons and to navigate through the menus. It works reasonably well, but is not as accurate as the scrolling of a pc mouse by sliding on a scroll bar.
Already opened it and cleaned the sensors, it is anyway or is there any way to get a better precision to turn the scrolling? Or is it some problem in my game? (which I find unlikely ...)
Tried to find something similar on the internet but I could not.

Thanks!