Earlier quoted context omitted.
I’m no longer sure about their quality though. Out of four Logitech mice I bought recently (four different models), two died within a year. At least their warranty repair/replace process was decent.
What do you do to your mouses to make them fail so quickly? Are you throwing them randomly accross the room?
At least one person has put together a good overview of what they think is happening: https://www.youtube.com/watch?v=v5BhECVlKJA (details in video description)