If you have watched this video from the Leica factory tour, (first video, 13:20 and 14:50 minute marks) you probably remember the “sticky stick” they used to clean the M9 sensor on the production line. I remember searching for this product online before and could not find it. This is what I stumble upon today:
Dot Line SensorVu Loupe & Cleaner Kit:
Dot Line SensorVu Cleaner Kit with Wand & Sheets, for CCD & CMOS Sensors:
Here is a video of a similar product in use:
