Pete
If the Artic butterfly doesn't clean a sensor then this is my next step
I prefer to use the rounded end cleaning sponge sticks as it can cover a smaller areas
but also use the spade types as well if necessary
I put a small spot on a clean work surface and dip the swap into it, far easier to control how much is applied to the swab. Any other way and you can flood the swab and that then really soaks the sensor and harder to wipe clean or dry. Then I use a dry swap to clear if any smears that may be left.
i have done my camera many times in the past and well worth doing. You are not without a camera for a time and at least you know it has been done properly.
I do have a "loupe" as well which makes the job so much easier. "Oh the cost" I often read for people. compare it with sending away a few times and the cost is covered.
Absolutely no way would I let anyone, who might have had a bad hair day, dive into my cameras to poke about in them , they cost me a lot of money so on that basis alone i am going to be more careful than some stranger.
AS for a rocket blower? yes I have use in a hurry but my thoughts are that it stirs up more dust within the camera body so tend to avoid if possible
So many think only professionals can clean a sensor, yet if they only realise how easy it is they would save a bundle. The only caveat is not to rush it and work in a clean area away from say carpets etc that may stir up dust