Have been using those normal blower to clean my sensor, but it seems not doing a clean job.
At F22 or F16 i always can see some dust in image, i know i can sent to Canon for cleaning, but that is troublesome and it cost $21.40 .
I have been to CSC for sensor cleaning before, but they will tell you after cleaning, at F22 there will still be one or two dust spot which is unavoidable.
Hence, i am thinking of investing on a good blower which can do a good blow job. Price is not a problem.