just wondering I have the MX1000 laser mouse.

my middle button doesn't work like it use to more. I think it started a few days ago.

I would have to press the middle button in hard to get it to register the button press.
(normally I push it lightly and feel the "click" and it would be good) now when I press it in and feel the click it doesn't get registered.

I have to push it in harder pass the click to get it to work..

any one know a way I can fix it?