On Sat, 12 Oct 2019 17:57:51 -0700, MouseUser wrote:

My favorite mouse is acting up.
Buttons double-click on a single-click and sometimes do not click at
all.


Is it possible to do my own refurbishment ?
Yes, you can get replacement switches for the buttons, this is the
classic symptom of worn-out switches. It seems all the mice and
trackballs use essentially the same micro-switch, so you can salvage them
from other mice or buy from Digi-Key, Mouser or whoever your electronic
parts supplier is.

Jon