Literally less than two years? In the EU you are probably eligible for a replacement, especially if some non-moving part (like sensors you mention below) fails.
I would prefer of course if producers made their products more sturdy (less e-waste).
Usually sensors stop working. I had a Kensington slimblade whose tracking light just stopped turning on, for example. No amount of cleaning will bring it back.
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Maybe it's time you switch to a trackball.
I'm the trackball destroying cousin. I have yet to have one last two years in the last 10 or 12 years since I switched from mice.
Literally less than two years? In the EU you are probably eligible for a replacement, especially if some non-moving part (like sensors you mention below) fails.
I would prefer of course if producers made their products more sturdy (less e-waste).
What is breaking? FYI, you need to remove the ball from time to time and remove the dust that might be blocking the optical sensors.
Usually sensors stop working. I had a Kensington slimblade whose tracking light just stopped turning on, for example. No amount of cleaning will bring it back.