A different kind of scroll wheel problem G603 : r/LogitechG
Fixing the "reversing scroll wheel glitch" on Logitech g603, - Album on Imgur
Logitech G603 review (a fantastic wireless mouse with a slightly dated design) - woorkup
G603 scroll wheel suddenly turned into hot wheels. Sent it in for warranty, they said it's working fine? I waited 1 whole month for this, and now I'm getting it back broken. :
New Original Mouse Pulley /scroll Wheel/mousewheel For Lo.gitech G703 G603 Mouse - Tablet Screen Protectors - AliExpress