Quote:
Originally Posted by EricSilver
I used the CRC Cleaner this past weekend. I suppose it works on very sensitive parts, but I noticed when I accidently sprayed a bit on a slightly dirty part of my index finger, the dirt was still there.
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Your finger and the sensor are made of different materials

I would venture a guess that the dirt "clings" differently to the sensor from your skin, and the cleaner itself has various chemicals which have different effects when encountering your skin.
amosfella, aren't there any car-parts stores near you?