I've noticed dust specs when i look through the viewfinder of my 350D... i've tried cleaning it but it seems that it's in the inner part of the viewfinder... and i can't get to it... any way i can clean that part?
Hmm what I usually do is use a small soft paint brush and a blower which does the trick.
However for more stubborn dirt or stains I use a lens cloth and a small tweezers (or anything small enough that'll fit into the view finder and still be able to maneuver). Wrap the cloth on the end of the tweezers and gently remove the dirt/stain.
tried that too... but that works for the part of the viewfinder that is exposed when you take out the lens... the dirt looks like it's in the space between the part you look into and the panel in the lens area... errrr.. yeah... kinda... dunno how to describe... that space inside the viewfinder lah... err... yeah...