Hello
I just want to share my experience and I don't want to refresh old discussions.
Today I discovered three dust particles on my K-S1's sensor. On pictures first of course.
A magnifying glass did the trick. White specks of dust on the sensor.
I two times did the cameras' sensor cleaning - without success.
Then I carefully used a 1KW vacuum cleaner. Dust particles are gone. These three specific particles forever
.
My advice: Before using a blower/adhesive try a vacuum. But be careful!!! Very careful!!!
Never ever stick/slide the pipe's end into the cameras' lens hole and beware of coming in there.
Just make shure a distance of approximately 1cm to the front side.
And firstly check the vacuum's power - in relation to distance - with your fingers.
Happy cleaning and best regards