Ok, so I just updated the firmware in my E-M1 from 1.1 to 2.2 using the digital camera updater. After updating the camera I was updating my Olympus lenses at the same time and when I was switching them I noticed that the sensor (or what appeared to be the sensor) had some dust on it. No biggie, I've cleaned the sensor before. I grabbed one of my disposable sensor swabs but when I went to clean it I realized I wasn't cleaning the sensor. It was a window that slightly moved around when I tried to clean it with the swab. The swab ended up leaving a residue on this window (they never do this on the sensor) So my questions I guess are: 1. What is this Window and why is it now locked in front of the sensor since the firmware update? 2. How can I lock up this window to get access to the sensor? 3. How can I clean this window since the sensor swabs don't work? Any advice appreciated.