@lauralt Mine's G403, but before that I had some A4Tech mouse which did the same and cleaning did nothing to it. Anyway, the G403 is in prtty rough shape as well (the rubberized grips started melting so I had to tear them off), so I just bit the bullet and bought some new chink mouse (lsusb detects it as "SINOWEALTH Wired Gaming Mouse" :xi2:).