The scroll ball on my mouse quit working in the down direction. Works fine in the other three ways. Can it be fixed?

Long time since I used a roller ball mouse, but I seem to remember that I could take the ball out on the one I had and get amongst it and clear out all the rubbish that gets trapped.

If you can't get the ball out, running the mouse up and down over sellotape in various directions was another way of clearing out any bits clogging the mechanism. Move the roller ball on to clean bits of the sellotape so that any rubbish doesn't find its way back inside.

It could probably do with a clean.

How to really clean your Mighty Mouse (with caution!):

http://support.apple.com/kb/HT3226?viewlocale=en_US

and:

http://web.mac.com/karelgil/iWeb/MacWebSite/MightyMEng.html

http://www.linklink.co.uk/apple-computers/cleaning-inside-and-dismantling-the-ap ple-mighty-mouse/

Hello !

Have same problem but going up ! ...On a one month old wired Apple Mouse No. A1152 on a spanking new iMac 27 ... tut tut

Meanwhile some cleaning links ...

https://discussions.apple.com/thread/2505688