[AngryData]

Their mice still have the same terrible button that they had 17 years ago when I bought an original MX 518 as far as I can tell. Ive fixed the button so many times on every mouse from them since them. I even made the mistake of buying the re-released mx-518 a year ago thinking that since they put this new fancy sensor in maybe they fixed the button finally. It took 4 months for me to get a double click problem from it again that required me to open it up and fix that damn microswitch. I don't know what mouse ill get next but ive completely given up on logitech.

[xxs]

One of the reasons their buttons suck is: effectively running the microswiches out of spec. D2f-01f requires min 5V with micro loads[0]. There would be a tiny spark during switching and over time that would prevent a perfect contact, the higher voltage helps penetrate through. Omron has factories in different countries, e.g. Japan and China - with the China switches "known to be not as good as the original ones". Of course the mice feature the China versions too.

In other words - your best bet is still replacing the switches to ensure longer life... I wonder if Logitech would ever consider stepping the voltage via capacitor charge pump to prevent double clicks.

[0]: https://omronfs.omron.com/en_US/ecb/products/pdf/en-d2f.pdf