Sensor Suck Not Blow !
 

I have thought it is better to suck the sensor than blow i have done it twice with a bulb blower by getting the air out and pointing it close to the sensor and move it around while exspelleng the air i did this twice and it work ,i then took a photo of a white piece of paper and put it on my computer and enlarged it,i thought if you can see a speck of dust on a photo you would see it on a photo of white printer paper ! and i did this and it was clean no dust at all,in the mean time i have found and orded a vaccuun cleaner but one that fits to your computer USB i have not tried this but i think it will be ideal,so i have orded one it costs just over £10 cheap !this is where i got it from,take a look.
http://www.innovasis.co.uk/home.php?cet=3
what it is realy for is cleaning your key board.

Anthony, make sure that you take any test shots at f20 or above if you're looking for dust on your sensor. At wide apertures it doesn't show up as well.

You can get these for free if your with Tiscali.

vacuum
 

Thank you for tips and replying,cheers.Tony.