Gene51 wrote:
More importantly, do you use a body cap? Have you looked at the part of that cap that faces the inside of the camera? How about the rear lens caps? Changing your lens' in the field does not necessarily increase the amount of dust on the sensor. But dirty lens and body caps do. I clean my caps weekly. My sensor gets cleaned when the dust starts to annoy me because I am spending too much time removing the specs from my images - which is about every 6 to 12 months.
Ever put double sided tape on the inside of both body and rear lens caps? Works like a charm! 😉