As Thierry says, I'd be very very nervous about anything that puts static anywhere near the sensor. CMOS is extremely sensitive to static electricity, even an inperceptible amount of static can blow a CMOS chip completely. That's why you should use anti-static precautions when playing around inside a computer.
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The thing about that is you are not actually toughing the sensor. You are cleaning a glass AA filter that is above the sensor. Since glass is non-conductive, static-electricity concerns are a non-issue.
