i had a few rather dark spots on some recent photos i had taken and they wouldn't come off with just the hurricane blower. used the makeup brush method described here: http://www.bobatkins.com/photography/digital/sensor_cleaning_ii.html the brush was just over $1 at walmart. i made sure it was synthetic fibers, very fine, and had a plastic handle. i cleaned it thoroughly with detergent, rinsed it well and let it air dry. then i blasted it with my hurricane blower many times to insure all water and dust was out. i tested it on some filters and it left no marks and the air blowing statically charged the brush so it picked up dust really well! pretty close to what you see here: http://www.amazon.com/exec/obidos/ASIN/B000AW5EPO/bobatkinsphotogr the moment of truth came. i blasted the brush several more times, locked up the cam's mirror, made a couple VERY VERY VERY LIGHT swipes.... i mean just so the tips of the bristles just barely touched the sensor. i photographed a white card and guess what? not one single spec of dust on the sensor now! great success!