I tried alcohol wipes on my previous blackberry (8320), but I feel like it cleaned it so well that it made it too smooth. This made it actually worse -- no grip.
Now on my 8900 I am running into the same problem. I increased the sensitivity from 70 to 80, but it's still taking me 3-4 swipes to go left and right in an email.
I second that on the increased sensitivity. Mine is set at 70 right now - 80 (that's what my pearl was at and carried over from the backup) is a huge jump in sensitivity but still takes a few swipes to scroll a page. I hear the only way to get the trackball out to clean it is getting some tools and taking the face plate off
I love the trackpad idea, less cleaning aside from the occasional quick swipe with some alcohol. Maybe newer 8900's will have this upgrade?...
Who told you, you could eat my cookies? Put that cookie down!... Now!
Courtesy of the Govenator