I took my track ball apart for the first time about 30 minutes ago and didn't think to read this thread before I did it! Guess what? Everything worked out fine and my ball now roll downwards with no problem. The only thing I didn't do was the qtip alcohol thing. I'm too afraid to add anything wet to the inside of my phone. It never crossed my mind to do so. It seems too risky.
There was a huge pile of lint stuck on one of the lil screws and it looked spooky. I had my pearl for a few years and boy did the lint in my pockets and purse accumulate. Lol the next time I take it apart (cause I know I'm gonna have to do it again) I'm going to follow these directions.
I don't know what ill do without my pearl (until I get the bold) if my phone died on me.