In any case, here are the steps that Marcus submitted:
1. You can remove the dust from under your screen fairly easily, actually:
2. Remove the black triangle-shaped stickers from the top corners of your screen (you may need to use a pin to pry them off)
3. Remove the four grey, rounded-square stickers on the bottom portion of your screen, in the same way, keeping the stickers in a place where they won't lose their 'stick'
4. Unscrew all six screws, and carefully pry off the entire top portion of the screen panel (the panel's edge is located on the sides of the monitor (basically cutting your entire monitor in half)). It takes a little effort, but if you're careful you won't damage anything.
5. Take a can of air spray and spray all dust out, or use a cloth if you prefer.
6. Follow the same directions backwards to reassemble. I've done this several times with success; the whole process takes 15 minutes or less for me. Dust gone, no problem.
Of course, with your repair time, you could probably go to that UPS center yourself and just have them do it while you watch.
As I've recently blogged, my tablet PC issues, other than the dust problem, appear to now be resolved. If my unit were not still under warranty, I'd remove the dust myself. Since I've paid for a warranty and since Toshiba came through, for me at least, I do not plan to do anything that would risk violating my warranty while it remains in effect.