@codeHaiku yes I
I completely agree. However on one of my trackballs the switch below the mouse wheel starts acting up having opened so many webpages in new tabs with middle clicks.
I guess the replacement of the OMRON switch inside is imminent. I already replaced the left button switch in both my #m570
@chairraver The #omron switch is a pain to switch. Every #logitech mouse I have ever had has issues with this after prolonged use. I just buy a new mouse and move on. The #m570 is only USD 29.99 these days. That is worth it since time spent ordering and replacing the switch seems excessive.
@codeHaiku Luckily I still have some spare ones from the last order. Prices apparently vary between regions. Amazon Germany lists the #m570 for roughly 57€.