Sensor cleaning and chamber lubricant

I recently got hold of the Visible Dust Arctic Butterfly as I had some noticeable dust on the sensor of my Canon DSLR. I'd heard these were really good so I popped a battery in, turned it on for 10 seconds as directed and then swept the brush across the sensor. I then took a picture of the sky and examined it for dust. All dust spots gone!

I then went to one of my haunts early the next morning (5am) along the coast to get some sunrise shots. After the sun was fully up I noticed something in the top right corner of the view finder which looked like a couple of streaks. I assumed that these were on the my polariser so I gave it a clean, took another shot a rechecked. The streaks were still there which meant there had to be something on the sensor! Now during shooting I hadn't noticed as the light was very low, the chance had also passed to get the shots again, and anyway I don't carry any sensor cleaning kit in my bag as I'm not overly keen on cleaning my sensor on the beach for obvious reasons!

After I returned home I flipped the mirror up on the camera and had a look at the sensor. There were two or three large oily streaks on the sensor it self. Where had this come from? I can only assume that the Arctic Butterfly had caught some excess lubrication from the chamber which had later fallen onto the sensor.

The photo's I had taken all had these streaks on them and it took me an absolute age to clean them up. At one point I thought the shots were ruined, but I managed to save them.

The moral here is BE VERY CAREFUL WITH SENSOR CLEANING BRUSHES and do NOT touch the side of the chamber!

to remove the oil I bought Visible dust swabs (£50.00!!) which easily removed the residue.

Thanks for listening.