Logitech g603 scrolling problem. I tried updating the firmware with an official update from logitech, but it only seemed to fix the problem somewhat. You don't have to replace the encoder like it's suggested by some users. The common scroll wheel problem with the g403, g603 and g703. I tried all the basic troubleshooting like updating the firmware, blowing dust out, putting the little piece of paper in the encoder, even spraying contact cleaner in there. Here's how to fix the Logitech G603 scroll wheel that keeps malfunctioning and scrolling up when i'm scrolling down or scrolling down when i'm scrolling up. Can't remove my usb dongle, as I do not have easy access to that port without moving a 50 lb sheet of glass, so I cannot I seem to be getting an odd issue, sometimes when scrolling the mouse wheel on my G603 it seems to change direction and tries to start scrolling the other way. My G603 was a torture. Logitech G603 scrolling wheel fix. I googled it and seems they’ve had plenty of problems with the scroll wheel and directional issues but on mine the nice resistance is gone and it will free spin. My scroll wheel on my desktop for this mouse is acting erratic, occasionally scrolling in the opposite direction that I am moving the wheel. zxnljbg 5few2f fsxopf6 mld6c kptms mmoy nhfvx ggi sof 9zdr