The answer by @dingdong is great! It worked on my Corsair Sabre RGB. The screw are hidden under the pads, though. You have to press for indentations to discover them. The screws are not conventional - Torx T6.
I flattened the washer that ratchets along in that little notched wheel and it made my scrolling buttery smooth. I don’t know why Corsair does that because the ratcheting works against smooth and precise scrolling.
Of course it’s no solution to Windows. Trying to scroll in Windows Explorer is as hopeless as it has been since the mouse wheel was invented. It still jumps line by line and it is impossible for the eye to follow, especially if you’re trying to scroll a folder with large or extra large image icons. You always give up and grab the handle on the scroll bar. Even then it’s a bit jumpy and it always leaves you frustrated because you know from browser scrolling how good it could be. Wish I had a fix for that.