Originally posted by insulinguy you guys rock! it is on the sensor - i know there have been many threads about cleaning and what not but just to rehash it - is the a blower that any of you have used that you would stand behind 100%? i am buying one today and cleaning the sensor tonight. im actually surprised that there is only one visible piece of dust on my sensor as i pretty much only shoot inside abandoned buildings full of asbestos and what not. im sure my lungs look like shit though!
So you're an urban explorer huh? Get the Giottos Rocket Blower and get the big one. Don't skimp here. Give it a couple short blasts (in a clean environment) before pointing it at your cameras sensor. Then blast the dust away (but don't Touch the sensor with the tip of the rocket blower). If you read the article I linked to, you'll see that for cleaning however, the Pentax O-ICK1 cleaning kit is the best for the money, IMO.
Good luck.