My thanks to everyone for contributing your stories to this thread. I thought that I somehow was missing something. At the moment I own: sensor swabs, sensor clean, a sensor brush, eclipse fluid, chamber clean and a sensor swipe (the spatula deal) and thus far I haven't seen 100% clean. My next experiment will be to use the sensor swipe with the fluid that comes with sensor clean (visible dust). In the end the clone stamp is pretty rockin.