Dryer Vent Cleaning?

[shana-lyons.livejournal.com]

We suspect our dryer vent needs to be cleaned out badly. Has anyone used a local cleaner that they feel like recommending? I'd like to find someone good because I think our situation may be challenging. Our dryer (and the vent) are on the 3rd floor and I'm not sure the dryer is moveable. It's wedged in so tightly into a converted closet that I suspect it's now structural.  I'm hoping for someone crafty because they'll probably need to go in via the vent.

Any suggestions are much appreciated!