Comment by alpaca128
3 years ago
I stopped using mine from Logitech because while not in motion there's often just enough friction that I can't make a small cursor movement, and that got annoying. Maybe it's better in other models, not sure, but other than that it was pleasant to use.
That's either a product defect or a symptom of dust accumulating near the internal optical sensors. For the latter, turn the device upside down, pop out the trackball and use a small brush to remove visible dust.