Just wanted to share my, ahem, experience with cleaning my sensor. I've been chasing dust round my sensor for 3 weeks now, and have finally finally solved the problem
First try was with a rocket blower: Danger factor: 1/10, effectiveness: 3/10. It only removed a few dust specs but I still had 6 or so stuck to the sensor
Second try was with the SensorKlear Sensor pen: Danger factor: 5/10, effectiveness: 1/10. After using this my sensor was far far dirtier than before, now I had 20+ specs of dust that could not be blown off
Third try was, well, basically I panicked and gently used a micro fibre cloth. Danger factor: 10/10, effectiveness 7/10. After about 30 attempts (I'm not joking) I managed to get the number of dust particles down to 6 again, right where I started. Only now I found I'd put 3 fine scratches on my sensor
. Somehow these don't show up on images though, maybe because they are so fine?
So lesson learned: never ever touch your sensor with a micro fibre cloth
Forth try was back with the SensorKlear sensor pen. This time I wiped excess carbon particles off on a micro fibre cloth before I put the pen on the sensor. After about 30 attempts I was down to 3 or 4 bits of dust, but it fluctuated from a low of 2 to a high or 10 again. Very frustrating
Fifth try was with the Pentax lollipop stamp. Danger factor: 3/10 Effectiveness 10/10. Holy crap I wish I'd used this before. Just 2 goes at it and I had a clear sensor (aside from the damage from the micro fibre cloth).