I've read many threads on here about the issue with the Curve and dust building up on the right side of the screen. I just have to say it was driving me nuts after a few months and I finally decided to do something about it.
The video that I used to open the Curve is here: YouTube - Blackberry Curve 8300 Screen Removal & Take Apart
You don't need to take the front lens off like some other people have done, it's much easier to just take it apart from behind and take the entire front off. There are a few tricky clips you have to be very careful about, but the entire process took me less than 10 minutes and my screen is finally clear!
I didn't have the "cell phone opening tool" they describe in the video, so I used a credit card to pry the edges up. I used a microfiber cloth and some canned air to get all the dust out.