My G502 started to have some resistance on the scroll wheel. While I was cleaning it, I decided to roughen up the mouse 1 and 2 buttons : r/G502MasterRace
Logitech G502 Cleaning Teardown and Reassembly - YouTube
Logitech G502 Cleaning | Before & After : r/LogitechG
How to clean the LOGITECH G502 Gaming Mouse - YouTube
Logitech G502 Lightspeed Gaming Mouse
Logitech G502 Cleaning | Before & After : r/LogitechG