Started on one computer mouse needing a new AA battery. Then re-glued the foot pad that had fallen off and was making it rock. While vigorously testing the other foot pads, they came off, and so I ended up re-gluing them all.
Then went one to another mouse and started to clean some dust in the corners of it. Turned out the dust was enough that I had an excuse to take it apart. Then there was enough random tiny fibers/hairs that I couldn’t get off that I went to use the air compressor to really get it clean. And re-glued the feet pads here, because, why not.
With as much as I take apart my computer mice, it causes the factory sticky tape to fail. So I actually cut out an access whole where the foot pad covers the hidden screws. And then I can use gel super glue to keep the foot pads down fully without curling.
I still use the older Logitech thumb trackball. Mostly just when traveling, so I don’t have to worry about having a good surface for mouse movement. I wish I could get one with more additional buttons.
That’s pretty much what I use, but went for another brand last time because Logitech doesn’t really improve their stuff anymore.
I buy used ones from eBay.