T i m wrote
John Hall wrote

Maybe the mouse is slipping on the pad? You could
try cleaning the mat and the underside of the mouse, as
grease tends to build up. You could even try dispensing
with a mat, if the top of your desk isn't too shiny.

I once bought a 'proper'(?) optical mouse mat and the Apple mouse
wouldn't work on it at all and my Logitech optical mouse was far less
accurate on that than on my leg! ;-(

I got the reverse effect with my Logitech M560. Wouldn't work at
all on my now extremely daggy ex book cover that I use to run the
mouse on with the cover on my lap in the big arm chair with my
feet up on the footstool that I do all my computing from.
https://www.dropbox.com/s/20wi83kl8v..._2880.jpg?dl=0
so I had to use a proper mouse mat on that.

That mouse wont track on the fleece on my chest in winter either.

The replacement Logitech M705 tracks fine on both without the
mouse mat. I still use the mouse mat on the extremely daggy ex
book cover just because the extremely daggy ex book cover is
now so rough and doesn't work well for the mouse feet.

With any luck Pamela will burst a blood vessel or something
when she sees the extremely daggy ex book cover :-(

I replaced the M560 with the M705 because the left mouse
button on the M560 has done the usual multi clicks on a
single left mouse click which is what has happened to all
the logitech mice I have ever owned. I used to get all
those mice for free because by the time that the button
fails, its still in the very long warranty and they can no
longer supply that mouse and so do a full refund.

Didn't work out like that with the M560 tho, I stupidly
bought 2 at the same time with a 3 year warranty so
I could just reach for the other when the first one
failed, but obviously when the second one failed
it was well outside the warranty period.