Hi!
Over in the LeiCanon list, this product was mentioned as a goo choice for
dust removal and sensor cleaning.
http://www.visibledust.com/
What do you use ... I may need to add some sensor cleaning stuff to my kit.
I bought standard camera cleaning kit (I think it is roughly $10 in
Israel) which includes plain blower. I simply use this blower only to
blow off the dust off my sensor.
I am going to visit Office Depot some day and buy the best nylon paint
brush as I read somewhere that it can be used too.
But, Shel, unless you would be swapping lenses in really dusty
conditions, I think you'd just fine as it is. I have my *istD for a
year, and only once I had serious dust condition. At the time, I took my
camera to one of the local shops and by careful yet experienced
application of the same blower the guy in the shop had my sensor cleaned.
YMMV of course.
Boris