Just some minutes ago I thought lets have a look at my sensor in bright sunlight. Then I thought what the hack, let's do some cleaning with the "Sensor cleaning pen" I got a while ago. I was amazed! It was like taking of a thin "soft filter". I did not think my sensor could shine more seconds before but after the cleaning it was shining blinding and thus much cleaner...
Seems the ultrasoon sensor cleaner from the camera is limited in keeping the sensor real clean.
Seems the ultrasoon sensor cleaner from the camera is limited in keeping the sensor real clean.